USB: use usb_endpoint_maxp() instead of le16_to_cpu()

Now ${LINUX}/drivers/usb/* can use usb_endpoint_maxp(desc) to get maximum packet size
instead of le16_to_cpu(desc->wMaxPacketSize).
This patch fix it up

Cc: Armin Fuerst <fuerst@in.tum.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Johannes Erdfelt <johannes@erdfelt.com>
Cc: Vojtech Pavlik <vojtech@suse.cz>
Cc: Oliver Neukum <oliver@neukum.name>
Cc: David Kubicek <dave@awk.cz>
Cc: Johan Hovold <jhovold@gmail.com>
Cc: Brad Hards <bhards@bigpond.net.au>
Acked-by: Felipe Balbi <balbi@ti.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Dahlmann <dahlmann.thomas@arcor.de>
Cc: David Brownell <david-b@pacbell.net>
Cc: David Lopo <dlopo@chipidea.mips.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Michal Nazarewicz <m.nazarewicz@samsung.com>
Cc: Xie Xiaobo <X.Xie@freescale.com>
Cc: Li Yang <leoli@freescale.com>
Cc: Jiang Bo <tanya.jiang@freescale.com>
Cc: Yuan-hsin Chen <yhchen@faraday-tech.com>
Cc: Darius Augulis <augulis.darius@gmail.com>
Cc: Xiaochen Shen <xiaochen.shen@intel.com>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: OKI SEMICONDUCTOR, <toshiharu-linux@dsn.okisemi.com>
Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Ben Dooks <ben@simtec.co.uk>
Cc: Thomas Abraham <thomas.ab@samsung.com>
Cc: Herbert Pötzl <herbert@13thfloor.at>
Cc: Arnaud Patard <arnaud.patard@rtp-net.org>
Cc: Roman Weissgaerber <weissg@vienna.at>
Acked-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Tony Olech <tony.olech@elandigitalsystems.com>
Cc: Florian Floe Echtler <echtler@fs.tum.de>
Cc: Christian Lucht <lucht@codemercs.com>
Cc: Juergen Stuber <starblue@sourceforge.net>
Cc: Georges Toth <g.toth@e-biz.lu>
Cc: Bill Ryder <bryder@sgi.com>
Cc: Kuba Ober <kuba@mareimbrium.org>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

58 files changed, 105 insertions, 111 deletions

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index dac7676ce21..f69a1854a59 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1058,11 +1058,11 @@ made_compressed_probe:
                 goto alloc_fail;
         }
 
-        ctrlsize = le16_to_cpu(epctrl->wMaxPacketSize);
-        readsize = le16_to_cpu(epread->wMaxPacketSize) *
+        ctrlsize = usb_endpoint_maxp(epctrl);
+        readsize = usb_endpoint_maxp(epread) *
                                 (quirks == SINGLE_RX_URB ? 1 : 2);
         acm->combined_interfaces = combined_interfaces;
-        acm->writesize = le16_to_cpu(epwrite->wMaxPacketSize) * 20;
+        acm->writesize = usb_endpoint_maxp(epwrite) * 20;
         acm->control = control_interface;
         acm->data = data_interface;
         acm->minor = minor;
diff --git a/drivers/usb/class/cdc-wdm.c b/drivers/usb/class/cdc-wdm.c
index 2b9ff518b50..1d26a7135dd 100644
--- a/drivers/usb/class/cdc-wdm.c
+++ b/drivers/usb/class/cdc-wdm.c
@@ -682,7 +682,7 @@ next_desc:
         if (!ep || !usb_endpoint_is_int_in(ep))
                 goto err;
 
-        desc->wMaxPacketSize = le16_to_cpu(ep->wMaxPacketSize);
+        desc->wMaxPacketSize = usb_endpoint_maxp(ep);
         desc->bMaxPacketSize0 = udev->descriptor.bMaxPacketSize0;
 
         desc->orq = kmalloc(sizeof(struct usb_ctrlrequest), GFP_KERNEL);
diff --git a/drivers/usb/class/usbtmc.c b/drivers/usb/class/usbtmc.c
index 3f94ac34dce..12cf5e7395a 100644
--- a/drivers/usb/class/usbtmc.c
+++ b/drivers/usb/class/usbtmc.c
@@ -186,8 +186,7 @@ static int usbtmc_ioctl_abort_bulk_in(struct usbtmc_device_data *data)
         for (n = 0; n < current_setting->desc.bNumEndpoints; n++)
                 if (current_setting->endpoint[n].desc.bEndpointAddress ==
                         data->bulk_in)
-                        max_size = le16_to_cpu(current_setting->endpoint[n].
-                                                desc.wMaxPacketSize);
+                        max_size = usb_endpoint_maxp(&current_setting->endpoint[n].desc);
 
         if (max_size == 0) {
                 dev_err(dev, "Couldn't get wMaxPacketSize\n");
@@ -636,7 +635,7 @@ static int usbtmc_ioctl_clear(struct usbtmc_device_data *data)
         for (n = 0; n < current_setting->desc.bNumEndpoints; n++) {
                 desc = &current_setting->endpoint[n].desc;
                 if (desc->bEndpointAddress == data->bulk_in)
-                        max_size = le16_to_cpu(desc->wMaxPacketSize);
+                        max_size = usb_endpoint_maxp(desc);
         }
 
         if (max_size == 0) {
diff --git a/drivers/usb/core/config.c b/drivers/usb/core/config.c
index 26678cadfb2..9d5e07af55b 100644
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -124,9 +124,9 @@ static void usb_parse_ss_endpoint_companion(struct device *ddev, int cfgno,
 
         if (usb_endpoint_xfer_isoc(&ep->desc))
                 max_tx = (desc->bMaxBurst + 1) * (desc->bmAttributes + 1) *
-                        le16_to_cpu(ep->desc.wMaxPacketSize);
+                        usb_endpoint_maxp(&ep->desc);
         else if (usb_endpoint_xfer_int(&ep->desc))
-                max_tx = le16_to_cpu(ep->desc.wMaxPacketSize) *
+                max_tx = usb_endpoint_maxp(&ep->desc) *
                         (desc->bMaxBurst + 1);
         else
                 max_tx = 999999;
@@ -241,7 +241,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
                     cfgno, inum, asnum, d->bEndpointAddress);
                 endpoint->desc.bmAttributes = USB_ENDPOINT_XFER_INT;
                 endpoint->desc.bInterval = 1;
-                if (le16_to_cpu(endpoint->desc.wMaxPacketSize) > 8)
+                if (usb_endpoint_maxp(&endpoint->desc) > 8)
                         endpoint->desc.wMaxPacketSize = cpu_to_le16(8);
         }
 
@@ -254,7 +254,7 @@ static int usb_parse_endpoint(struct device *ddev, int cfgno, int inum,
                         && usb_endpoint_xfer_bulk(d)) {
                 unsigned maxp;
 
-                maxp = le16_to_cpu(endpoint->desc.wMaxPacketSize) & 0x07ff;
+                maxp = usb_endpoint_maxp(&endpoint->desc) & 0x07ff;
                 if (maxp != 512)
                         dev_warn(ddev, "config %d interface %d altsetting %d "
                                 "bulk endpoint 0x%X has invalid maxpacket %d\n",
diff --git a/drivers/usb/core/devices.c b/drivers/usb/core/devices.c
index 0149c0976e9..d9569658476 100644
--- a/drivers/usb/core/devices.c
+++ b/drivers/usb/core/devices.c
@@ -190,7 +190,7 @@ static char *usb_dump_endpoint_descriptor(int speed, char *start, char *end,
         dir = usb_endpoint_dir_in(desc) ? 'I' : 'O';
 
         if (speed == USB_SPEED_HIGH) {
-                switch (le16_to_cpu(desc->wMaxPacketSize) & (0x03 << 11)) {
+                switch (usb_endpoint_maxp(desc) & (0x03 << 11)) {
                 case 1 << 11:
                         bandwidth = 2; break;
                 case 2 << 11:
@@ -240,7 +240,7 @@ static char *usb_dump_endpoint_descriptor(int speed, char *start, char *end,
 
         start += sprintf(start, format_endpt, desc->bEndpointAddress, dir,
                          desc->bmAttributes, type,
-                         (le16_to_cpu(desc->wMaxPacketSize) & 0x07ff) *
+                         (usb_endpoint_maxp(desc) & 0x07ff) *
                          bandwidth,
                          interval, unit);
         return start;
diff --git a/drivers/usb/core/endpoint.c b/drivers/usb/core/endpoint.c
index df502a98d0d..db7fe50c23d 100644
--- a/drivers/usb/core/endpoint.c
+++ b/drivers/usb/core/endpoint.c
@@ -56,7 +56,7 @@ static ssize_t show_ep_wMaxPacketSize(struct device *dev,
 {
         struct ep_device *ep = to_ep_device(dev);
         return sprintf(buf, "%04x\n",
-                        le16_to_cpu(ep->desc->wMaxPacketSize) & 0x07ff);
+                        usb_endpoint_maxp(ep->desc) & 0x07ff);
 }
 static DEVICE_ATTR(wMaxPacketSize, S_IRUGO, show_ep_wMaxPacketSize, NULL);
 
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 99fff6be364..338f91ff54c 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -3018,7 +3018,7 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
                 i = 512;
         else
                 i = udev->descriptor.bMaxPacketSize0;
-        if (le16_to_cpu(udev->ep0.desc.wMaxPacketSize) != i) {
+        if (usb_endpoint_maxp(&udev->ep0.desc) != i) {
                 if (udev->speed == USB_SPEED_LOW ||
                                 !(i == 8 || i == 16 || i == 32 || i == 64)) {
                         dev_err(&udev->dev, "Invalid ep0 maxpacket: %d\n", i);
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index ae334b067c1..909625b91eb 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -350,7 +350,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
                         dev->state < USB_STATE_CONFIGURED)
                 return -ENODEV;
 
-        max = le16_to_cpu(ep->desc.wMaxPacketSize);
+        max = usb_endpoint_maxp(&ep->desc);
         if (max <= 0) {
                 dev_dbg(&dev->dev,
                         "bogus endpoint ep%d%s in %s (bad maxpacket %d)\n",
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index de5f0afa890..cebaef720cd 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -254,8 +254,7 @@ static int dwc3_gadget_set_ep_config(struct dwc3 *dwc, struct dwc3_ep *dep,
         memset(&params, 0x00, sizeof(params));
 
         params.param0.depcfg.ep_type = usb_endpoint_type(desc);
-        params.param0.depcfg.max_packet_size =
-                le16_to_cpu(desc->wMaxPacketSize);
+        params.param0.depcfg.max_packet_size = usb_endpoint_maxp(desc);
 
         params.param1.depcfg.xfer_complete_enable = true;
         params.param1.depcfg.xfer_not_ready_enable = true;
diff --git a/drivers/usb/gadget/amd5536udc.c b/drivers/usb/gadget/amd5536udc.c
index 70f2b376c86..d65d8392be7 100644
--- a/drivers/usb/gadget/amd5536udc.c
+++ b/drivers/usb/gadget/amd5536udc.c
@@ -354,7 +354,7 @@ udc_ep_enable(struct usb_ep *usbep, const struct usb_endpoint_descriptor *desc)
         writel(tmp, &dev->ep[ep->num].regs->ctl);
 
         /* set max packet size */
-        maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+        maxpacket = usb_endpoint_maxp(desc);
         tmp = readl(&dev->ep[ep->num].regs->bufout_maxpkt);
         tmp = AMD_ADDBITS(tmp, maxpacket, UDC_EP_MAX_PKT_SIZE);
         ep->ep.maxpacket = maxpacket;
diff --git a/drivers/usb/gadget/at91_udc.c b/drivers/usb/gadget/at91_udc.c
index ddb118a7680..d01fa5badd6 100644
--- a/drivers/usb/gadget/at91_udc.c
+++ b/drivers/usb/gadget/at91_udc.c
@@ -487,7 +487,7 @@ static int at91_ep_enable(struct usb_ep *_ep,
                         || !desc || ep->desc
                         || _ep->name == ep0name
                         || desc->bDescriptorType != USB_DT_ENDPOINT
-                        || (maxpacket = le16_to_cpu(desc->wMaxPacketSize)) == 0
+                        || (maxpacket = usb_endpoint_maxp(desc)) == 0
                         || maxpacket > ep->maxpacket) {
                 DBG("bad ep or descriptor\n");
                 return -EINVAL;
diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 5b1665eb1be..722c468e9b3 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -527,7 +527,7 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
 
         DBG(DBG_GADGET, "%s: ep_enable: desc=%p\n", ep->ep.name, desc);
 
-        maxpacket = le16_to_cpu(desc->wMaxPacketSize) & 0x7ff;
+        maxpacket = usb_endpoint_maxp(desc) & 0x7ff;
 
         if (((desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK) != ep->index)
                         || ep->index == 0
@@ -571,7 +571,7 @@ usba_ep_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
                  * Bits 11:12 specify number of _additional_
                  * transactions per microframe.
                  */
-                nr_trans = ((le16_to_cpu(desc->wMaxPacketSize) >> 11) & 3) + 1;
+                nr_trans = ((usb_endpoint_maxp(desc) >> 11) & 3) + 1;
                 if (nr_trans > 3)
                         return -EINVAL;
 
diff --git a/drivers/usb/gadget/ci13xxx_udc.c b/drivers/usb/gadget/ci13xxx_udc.c
index 1265a8502ea..83428f56253 100644
--- a/drivers/usb/gadget/ci13xxx_udc.c
+++ b/drivers/usb/gadget/ci13xxx_udc.c
@@ -2101,7 +2101,7 @@ static int ep_enable(struct usb_ep *ep,
         mEp->num  = usb_endpoint_num(desc);
         mEp->type = usb_endpoint_type(desc);
 
-        mEp->ep.maxpacket = __constant_le16_to_cpu(desc->wMaxPacketSize);
+        mEp->ep.maxpacket = usb_endpoint_maxp(desc);
 
         dbg_event(_usb_addr(mEp), "ENABLE", 0);
 
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index aef47414f5d..8065464523b 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -164,7 +164,7 @@ int config_ep_by_speed(struct usb_gadget *g,
 
 ep_found:
         /* commit results */
-        _ep->maxpacket = le16_to_cpu(chosen_desc->wMaxPacketSize);
+        _ep->maxpacket = usb_endpoint_maxp(chosen_desc);
         _ep->desc = chosen_desc;
         _ep->comp_desc = NULL;
         _ep->maxburst = 0;
diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index e755a9d267f..7b06d39d620 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -439,7 +439,7 @@ dummy_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
          * maximum packet size.
          * For SS devices the wMaxPacketSize is limited by 1024.
          */
-        max = le16_to_cpu(desc->wMaxPacketSize) & 0x7ff;
+        max = usb_endpoint_maxp(desc) & 0x7ff;
 
         /* drivers must not request bad settings, since lower levels
          * (hardware or its drivers) may not check.  some endpoints
@@ -1277,7 +1277,7 @@ static int periodic_bytes (struct dummy *dum, struct dummy_ep *ep)
                 int     tmp;
 
                 /* high bandwidth mode */
-                tmp = le16_to_cpu(ep->desc->wMaxPacketSize);
+                tmp = usb_endpoint_maxp(ep->desc);
                 tmp = (tmp >> 11) & 0x03;
                 tmp *= 8 /* applies to entire frame */;
                 limit += limit * tmp;
diff --git a/drivers/usb/gadget/epautoconf.c b/drivers/usb/gadget/epautoconf.c
index 7a7e6b7e1fd..cdca7ebb7b4 100644
--- a/drivers/usb/gadget/epautoconf.c
+++ b/drivers/usb/gadget/epautoconf.c
@@ -158,7 +158,7 @@ ep_matches (
          * where it's an output parameter representing the full speed limit.
          * the usb spec fixes high speed bulk maxpacket at 512 bytes.
          */
-        max = 0x7ff & le16_to_cpu(desc->wMaxPacketSize);
+        max = 0x7ff & usb_endpoint_maxp(desc);
         switch (type) {
         case USB_ENDPOINT_XFER_INT:
                 /* INT:  limit 64 bytes full speed, 1024 high/super speed */
diff --git a/drivers/usb/gadget/f_mass_storage.c b/drivers/usb/gadget/f_mass_storage.c
index 5b933958200..4ce3decda1d 100644
--- a/drivers/usb/gadget/f_mass_storage.c
+++ b/drivers/usb/gadget/f_mass_storage.c
@@ -2401,8 +2401,7 @@ reset:
                 goto reset;
         fsg->bulk_out->driver_data = common;
         fsg->bulk_out_enabled = 1;
-        common->bulk_out_maxpacket =
-                le16_to_cpu(fsg->bulk_out->desc->wMaxPacketSize);
+        common->bulk_out_maxpacket = usb_endpoint_maxp(fsg->bulk_out->desc);
         clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
 
         /* Allocate the requests */
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index 639e14a2fd1..39ece40a045 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -2801,7 +2801,7 @@ reset:
         if ((rc = enable_endpoint(fsg, fsg->bulk_out, d)) != 0)
                 goto reset;
         fsg->bulk_out_enabled = 1;
-        fsg->bulk_out_maxpacket = le16_to_cpu(d->wMaxPacketSize);
+        fsg->bulk_out_maxpacket = usb_endpoint_maxp(d);
         clear_bit(IGNORE_BULK_OUT, &fsg->atomic_bitflags);
 
         if (transport_is_cbi()) {
diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
index 3bf872e1ad3..2a03e4de11c 100644
--- a/drivers/usb/gadget/fsl_qe_udc.c
+++ b/drivers/usb/gadget/fsl_qe_udc.c
@@ -540,7 +540,7 @@ static int qe_ep_init(struct qe_udc *udc,
         int reval = 0;
         u16 max = 0;
 
-        max = le16_to_cpu(desc->wMaxPacketSize);
+        max = usb_endpoint_maxp(desc);
 
         /* check the max package size validate for this endpoint */
         /* Refer to USB2.0 spec table 9-13,
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index de24a4233c2..d6993507165 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -559,7 +559,7 @@ static int fsl_ep_enable(struct usb_ep *_ep,
         if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
                 return -ESHUTDOWN;
 
-        max = le16_to_cpu(desc->wMaxPacketSize);
+        max = usb_endpoint_maxp(desc);
 
         /* Disable automatic zlp generation.  Driver is responsible to indicate
          * explicitly through req->req.zero.  This is needed to enable multi-td
diff --git a/drivers/usb/gadget/fusb300_udc.c b/drivers/usb/gadget/fusb300_udc.c
index 4ec888f9000..d9ee6c37a6c 100644
--- a/drivers/usb/gadget/fusb300_udc.c
+++ b/drivers/usb/gadget/fusb300_udc.c
@@ -220,7 +220,7 @@ static int config_ep(struct fusb300_ep *ep,
 
         info.type = desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK;
         info.dir_in = (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK) ? 1 : 0;
-        info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+        info.maxpacket = usb_endpoint_maxp(desc);
         info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
 
         if ((info.type == USB_ENDPOINT_XFER_INT) ||
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index 692fd9b2248..bf08bfcd90b 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -689,7 +689,7 @@ static int imx_ep_enable(struct usb_ep *usb_ep,
                 return -EINVAL;
         }
 
-        if (imx_ep->fifosize < le16_to_cpu(desc->wMaxPacketSize)) {
+        if (imx_ep->fifosize < usb_endpoint_maxp(desc)) {
                 D_ERR(imx_usb->dev,
                         "<%s> bad %s maxpacket\n", __func__, usb_ep->name);
                 return -ERANGE;
diff --git a/drivers/usb/gadget/langwell_udc.c b/drivers/usb/gadget/langwell_udc.c
index a06e2c27b43..5bf9942eb45 100644
--- a/drivers/usb/gadget/langwell_udc.c
+++ b/drivers/usb/gadget/langwell_udc.c
@@ -283,7 +283,7 @@ static int langwell_ep_enable(struct usb_ep *_ep,
         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
                 return -ESHUTDOWN;
 
-        max = le16_to_cpu(desc->wMaxPacketSize);
+        max = usb_endpoint_maxp(desc);
 
         /*
          * disable HW zero length termination select
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 491f825ed5c..5e597c3c44f 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -370,7 +370,7 @@ static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep,
 
         ep->pipectr = get_pipectr_addr(pipenum);
         ep->pipenum = pipenum;
-        ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+        ep->ep.maxpacket = usb_endpoint_maxp(desc);
         m66592->pipenum2ep[pipenum] = ep;
         m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep;
         INIT_LIST_HEAD(&ep->queue);
@@ -447,7 +447,7 @@ static int alloc_pipe_config(struct m66592_ep *ep,
         ep->type = info.type;
 
         info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
-        info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+        info.maxpacket = usb_endpoint_maxp(desc);
         info.interval = desc->bInterval;
         if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
                 info.dir_in = 1;
diff --git a/drivers/usb/gadget/mv_udc_core.c b/drivers/usb/gadget/mv_udc_core.c
index ce1ac2bcb31..263dec40af3 100644
--- a/drivers/usb/gadget/mv_udc_core.c
+++ b/drivers/usb/gadget/mv_udc_core.c
@@ -493,7 +493,7 @@ static int mv_ep_enable(struct usb_ep *_ep,
                 return -ESHUTDOWN;
 
         direction = ep_dir(ep);
-        max = le16_to_cpu(desc->wMaxPacketSize);
+        max = usb_endpoint_maxp(desc);
 
         /*
          * disable HW zero length termination select
diff --git a/drivers/usb/gadget/net2272.c b/drivers/usb/gadget/net2272.c
index ab98ea926a1..6fef1c02448 100644
--- a/drivers/usb/gadget/net2272.c
+++ b/drivers/usb/gadget/net2272.c
@@ -204,7 +204,7 @@ net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
                 return -ESHUTDOWN;
 
-        max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
+        max = usb_endpoint_maxp(desc) & 0x1fff;
 
         spin_lock_irqsave(&dev->lock, flags);
         _ep->maxpacket = max & 0x7fff;
diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 3dd40b4e675..8d3673fadfe 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -169,7 +169,7 @@ net2280_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc)
                 return -EDOM;
 
         /* sanity check ep-e/ep-f since their fifos are small */
-        max = le16_to_cpu (desc->wMaxPacketSize) & 0x1fff;
+        max = usb_endpoint_maxp (desc) & 0x1fff;
         if (ep->num > 4 && max > 64)
                 return -ERANGE;
 
@@ -1640,7 +1640,7 @@ show_queues (struct device *_dev, struct device_attribute *attr, char *buf)
                                  default:
                                         val = "iso"; break;
                                  }; val; }),
-                                le16_to_cpu (d->wMaxPacketSize) & 0x1fff,
+                                usb_endpoint_maxp (d) & 0x1fff,
                                 ep->dma ? "dma" : "pio", ep->fifo_size
                                 );
                 } else /* ep0 should only have one transfer queued */
diff --git a/drivers/usb/gadget/omap_udc.c b/drivers/usb/gadget/omap_udc.c
index 740c7daed27..b7a7799ddd4 100644
--- a/drivers/usb/gadget/omap_udc.c
+++ b/drivers/usb/gadget/omap_udc.c
@@ -166,15 +166,14 @@ static int omap_ep_enable(struct usb_ep *_ep,
         if (!_ep || !desc || ep->desc
                         || desc->bDescriptorType != USB_DT_ENDPOINT
                         || ep->bEndpointAddress != desc->bEndpointAddress
-                        || ep->maxpacket < le16_to_cpu
-                                                (desc->wMaxPacketSize)) {
+                        || ep->maxpacket < usb_endpoint_maxp(desc)) {
                 DBG("%s, bad ep or descriptor\n", __func__);
                 return -EINVAL;
         }
-        maxp = le16_to_cpu (desc->wMaxPacketSize);
+        maxp = usb_endpoint_maxp(desc);
         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
                                 && maxp != ep->maxpacket)
-                        || le16_to_cpu(desc->wMaxPacketSize) > ep->maxpacket
+                        || usb_endpoint_maxp(desc) > ep->maxpacket
                         || !desc->wMaxPacketSize) {
                 DBG("%s, bad %s maxpacket\n", __func__, _ep->name);
                 return -ERANGE;
diff --git a/drivers/usb/gadget/pch_udc.c b/drivers/usb/gadget/pch_udc.c
index f96615ab6b7..b69ae3eec68 100644
--- a/drivers/usb/gadget/pch_udc.c
+++ b/drivers/usb/gadget/pch_udc.c
@@ -947,7 +947,7 @@ static void pch_udc_ep_enable(struct pch_udc_ep *ep,
         else
                 buff_size = UDC_EPOUT_BUFF_SIZE;
         pch_udc_ep_set_bufsz(ep, buff_size, ep->in);
-        pch_udc_ep_set_maxpkt(ep, le16_to_cpu(desc->wMaxPacketSize));
+        pch_udc_ep_set_maxpkt(ep, usb_endpoint_maxp(desc));
         pch_udc_ep_set_nak(ep);
         pch_udc_ep_fifo_flush(ep, ep->in);
         /* Configure the endpoint */
@@ -957,7 +957,7 @@ static void pch_udc_ep_enable(struct pch_udc_ep *ep,
               (cfg->cur_cfg << UDC_CSR_NE_CFG_SHIFT) |
               (cfg->cur_intf << UDC_CSR_NE_INTF_SHIFT) |
               (cfg->cur_alt << UDC_CSR_NE_ALT_SHIFT) |
-              le16_to_cpu(desc->wMaxPacketSize) << UDC_CSR_NE_MAX_PKT_SHIFT;
+              usb_endpoint_maxp(desc) << UDC_CSR_NE_MAX_PKT_SHIFT;
 
         if (ep->in)
                 pch_udc_write_csr(ep->dev, val, UDC_EPIN_IDX(ep->num));
@@ -1466,7 +1466,7 @@ static int pch_udc_pcd_ep_enable(struct usb_ep *usbep,
         ep->desc = desc;
         ep->halted = 0;
         pch_udc_ep_enable(ep, &ep->dev->cfg_data, desc);
-        ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+        ep->ep.maxpacket = usb_endpoint_maxp(desc);
         pch_udc_enable_ep_interrupts(ep->dev, PCH_UDC_EPINT(ep->in, ep->num));
         spin_unlock_irqrestore(&dev->lock, iflags);
         return 0;
diff --git a/drivers/usb/gadget/pxa25x_udc.c b/drivers/usb/gadget/pxa25x_udc.c
index e4e59b4de25..7862465291d 100644
--- a/drivers/usb/gadget/pxa25x_udc.c
+++ b/drivers/usb/gadget/pxa25x_udc.c
@@ -232,8 +232,7 @@ static int pxa25x_ep_enable (struct usb_ep *_ep,
         if (!_ep || !desc || ep->desc || _ep->name == ep0name
                         || desc->bDescriptorType != USB_DT_ENDPOINT
                         || ep->bEndpointAddress != desc->bEndpointAddress
-                        || ep->fifo_size < le16_to_cpu
-                                                (desc->wMaxPacketSize)) {
+                        || ep->fifo_size < usb_endpoint_maxp (desc)) {
                 DMSG("%s, bad ep or descriptor\n", __func__);
                 return -EINVAL;
         }
@@ -248,7 +247,7 @@ static int pxa25x_ep_enable (struct usb_ep *_ep,
 
         /* hardware _could_ do smaller, but driver doesn't */
         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
-                                && le16_to_cpu (desc->wMaxPacketSize)
+                                && usb_endpoint_maxp (desc)
                                                 != BULK_FIFO_SIZE)
                         || !desc->wMaxPacketSize) {
                 DMSG("%s, bad %s maxpacket\n", __func__, _ep->name);
@@ -264,7 +263,7 @@ static int pxa25x_ep_enable (struct usb_ep *_ep,
         ep->desc = desc;
         ep->stopped = 0;
         ep->pio_irqs = 0;
-        ep->ep.maxpacket = le16_to_cpu (desc->wMaxPacketSize);
+        ep->ep.maxpacket = usb_endpoint_maxp (desc);
 
         /* flush fifo (mostly for OUT buffers) */
         pxa25x_ep_fifo_flush (_ep);
@@ -401,7 +400,7 @@ write_fifo (struct pxa25x_ep *ep, struct pxa25x_request *req)
 {
         unsigned                max;
 
-        max = le16_to_cpu(ep->desc->wMaxPacketSize);
+        max = usb_endpoint_maxp(ep->desc);
         do {
                 unsigned        count;
                 int             is_last, is_short;
@@ -671,8 +670,7 @@ pxa25x_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
          * we can report per-packet status.  that also helps with dma.
          */
         if (unlikely (ep->bmAttributes == USB_ENDPOINT_XFER_ISOC
-                        && req->req.length > le16_to_cpu
-                                                (ep->desc->wMaxPacketSize)))
+                        && req->req.length > usb_endpoint_maxp (ep->desc)))
                 return -EMSGSIZE;
 
         DBG(DBG_NOISY, "%s queue req %p, len %d buf %p\n",
@@ -1105,7 +1103,7 @@ udc_seq_show(struct seq_file *m, void *_d)
                         tmp = *dev->ep [i].reg_udccs;
                         seq_printf(m,
                                 "%s max %d %s udccs %02x irqs %lu\n",
-                                ep->ep.name, le16_to_cpu(desc->wMaxPacketSize),
+                                ep->ep.name, usb_endpoint_maxp(desc),
                                 "pio", tmp, ep->pio_irqs);
                         /* TODO translate all five groups of udccs bits! */
 
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 85b68c75dc9..d21455f457e 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -1439,7 +1439,7 @@ static int pxa_ep_enable(struct usb_ep *_ep,
                 return -EINVAL;
         }
 
-        if (ep->fifo_size < le16_to_cpu(desc->wMaxPacketSize)) {
+        if (ep->fifo_size < usb_endpoint_maxp(desc)) {
                 ep_err(ep, "bad maxpacket\n");
                 return -ERANGE;
         }
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index 50991e5bd5e..61d0c65802e 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -341,7 +341,7 @@ static void r8a66597_ep_setting(struct r8a66597 *r8a66597,
 
         ep->pipectr = get_pipectr_addr(pipenum);
         ep->pipenum = pipenum;
-        ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+        ep->ep.maxpacket = usb_endpoint_maxp(desc);
         r8a66597->pipenum2ep[pipenum] = ep;
         r8a66597->epaddr2ep[desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK]
                 = ep;
@@ -420,7 +420,7 @@ static int alloc_pipe_config(struct r8a66597_ep *ep,
         ep->type = info.type;
 
         info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
-        info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+        info.maxpacket = usb_endpoint_maxp(desc);
         info.interval = desc->bInterval;
         if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
                 info.dir_in = 1;
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 8bdee67ce09..39b134dec94 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2297,7 +2297,7 @@ static int s3c_hsotg_ep_enable(struct usb_ep *ep,
                 return -EINVAL;
         }
 
-        mps = le16_to_cpu(desc->wMaxPacketSize);
+        mps = usb_endpoint_maxp(desc);
 
         /* note, we handle this here instead of s3c_hsotg_set_ep_maxpacket */
 
diff --git a/drivers/usb/gadget/s3c-hsudc.c b/drivers/usb/gadget/s3c-hsudc.c
index 3e96cc5bb77..25829b4398d 100644
--- a/drivers/usb/gadget/s3c-hsudc.c
+++ b/drivers/usb/gadget/s3c-hsudc.c
@@ -761,11 +761,11 @@ static int s3c_hsudc_ep_enable(struct usb_ep *_ep,
         if (!_ep || !desc || hsep->desc || _ep->name == ep0name
                 || desc->bDescriptorType != USB_DT_ENDPOINT
                 || hsep->bEndpointAddress != desc->bEndpointAddress
-                || ep_maxpacket(hsep) < le16_to_cpu(desc->wMaxPacketSize))
+                || ep_maxpacket(hsep) < usb_endpoint_maxp(desc))
                 return -EINVAL;
 
         if ((desc->bmAttributes == USB_ENDPOINT_XFER_BULK
-                && le16_to_cpu(desc->wMaxPacketSize) != ep_maxpacket(hsep))
+                && usb_endpoint_maxp(desc) != ep_maxpacket(hsep))
                 || !desc->wMaxPacketSize)
                 return -ERANGE;
 
@@ -781,7 +781,7 @@ static int s3c_hsudc_ep_enable(struct usb_ep *_ep,
 
         hsep->stopped = hsep->wedge = 0;
         hsep->desc = desc;
-        hsep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+        hsep->ep.maxpacket = usb_endpoint_maxp(desc);
 
         s3c_hsudc_set_halt(_ep, 0);
         __set_bit(ep_index(hsep), hsudc->regs + S3C_EIER);
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index 8d31848aab0..25728544867 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -1082,7 +1082,7 @@ static int s3c2410_udc_ep_enable(struct usb_ep *_ep,
         if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN)
                 return -ESHUTDOWN;
 
-        max = le16_to_cpu(desc->wMaxPacketSize) & 0x1fff;
+        max = usb_endpoint_maxp(desc) & 0x1fff;
 
         local_irq_save (flags);
         _ep->maxpacket = max & 0x7ff;
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index dd24fc115e4..15dc51ded61 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -428,7 +428,7 @@ static struct ed *ed_get (
                 ed->type = usb_pipetype(pipe);
 
                 info |= (ep->desc.bEndpointAddress & ~USB_DIR_IN) << 7;
-                info |= le16_to_cpu(ep->desc.wMaxPacketSize) << 16;
+                info |= usb_endpoint_maxp(&ep->desc) << 16;
                 if (udev->speed == USB_SPEED_LOW)
                         info |= ED_LOWSPEED;
                 /* only control transfers store pids in tds */
@@ -444,7 +444,7 @@ static struct ed *ed_get (
                                 ed->load = usb_calc_bus_time (
                                         udev->speed, !is_out,
                                         ed->type == PIPE_ISOCHRONOUS,
-                                        le16_to_cpu(ep->desc.wMaxPacketSize))
+                                        usb_endpoint_maxp(&ep->desc))
                                                 / 1000;
                         }
                 }
diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index 40a0d8b03ad..a6f256436e7 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -959,7 +959,7 @@ static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb,
         info.pipenum = get_empty_pipenum(r8a66597, ep);
         info.address = get_urb_to_r8a66597_addr(r8a66597, urb);
         info.epnum = usb_endpoint_num(ep);
-        info.maxpacket = le16_to_cpu(ep->wMaxPacketSize);
+        info.maxpacket = usb_endpoint_maxp(ep);
         info.type = get_r8a66597_type(usb_endpoint_type(ep));
         info.bufnum = get_bufnum(info.pipenum);
         info.buf_bsize = get_buf_bsize(info.pipenum);
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index 84ed28b34f9..f6ca80ee4ce 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -280,7 +280,7 @@ static struct uhci_qh *uhci_alloc_qh(struct uhci_hcd *uhci,
                         qh->load = usb_calc_bus_time(udev->speed,
                                         usb_endpoint_dir_in(&hep->desc),
                                         qh->type == USB_ENDPOINT_XFER_ISOC,
-                                        le16_to_cpu(hep->desc.wMaxPacketSize))
+                                        usb_endpoint_maxp(&hep->desc))
                                 / 1000 + 1;
 
         } else {                /* Skeleton QH */
@@ -792,7 +792,7 @@ static int uhci_submit_control(struct uhci_hcd *uhci, struct urb *urb,
 {
         struct uhci_td *td;
         unsigned long destination, status;
-        int maxsze = le16_to_cpu(qh->hep->desc.wMaxPacketSize);
+        int maxsze = usb_endpoint_maxp(&qh->hep->desc);
         int len = urb->transfer_buffer_length;
         dma_addr_t data = urb->transfer_dma;
         __hc32 *plink;
@@ -918,7 +918,7 @@ static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb,
 {
         struct uhci_td *td;
         unsigned long destination, status;
-        int maxsze = le16_to_cpu(qh->hep->desc.wMaxPacketSize);
+        int maxsze = usb_endpoint_maxp(&qh->hep->desc);
         int len = urb->transfer_buffer_length;
         int this_sg_len;
         dma_addr_t data;
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index d446886b22b..d873a0330c9 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1141,8 +1141,8 @@ static u32 xhci_get_max_esit_payload(struct xhci_hcd *xhci,
         if (udev->speed == USB_SPEED_SUPER)
                 return le16_to_cpu(ep->ss_ep_comp.wBytesPerInterval);
 
-        max_packet = GET_MAX_PACKET(le16_to_cpu(ep->desc.wMaxPacketSize));
-        max_burst = (le16_to_cpu(ep->desc.wMaxPacketSize) & 0x1800) >> 11;
+        max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc));
+        max_burst = (usb_endpoint_maxp(&ep->desc) & 0x1800) >> 11;
         /* A 0 in max burst means 1 transfer per ESIT */
         return max_packet * (max_burst + 1);
 }
@@ -1211,7 +1211,7 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
         /* Set the max packet size and max burst */
         switch (udev->speed) {
         case USB_SPEED_SUPER:
-                max_packet = le16_to_cpu(ep->desc.wMaxPacketSize);
+                max_packet = usb_endpoint_maxp(&ep->desc);
                 ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet));
                 /* dig out max burst from ep companion desc */
                 max_packet = ep->ss_ep_comp.bMaxBurst;
@@ -1223,14 +1223,14 @@ int xhci_endpoint_init(struct xhci_hcd *xhci,
                  */
                 if (usb_endpoint_xfer_isoc(&ep->desc) ||
                                 usb_endpoint_xfer_int(&ep->desc)) {
-                        max_burst = (le16_to_cpu(ep->desc.wMaxPacketSize)
+                        max_burst = (usb_endpoint_maxp(&ep->desc)
                                      & 0x1800) >> 11;
                         ep_ctx->ep_info2 |= cpu_to_le32(MAX_BURST(max_burst));
                 }
                 /* Fall through */
         case USB_SPEED_FULL:
         case USB_SPEED_LOW:
-                max_packet = GET_MAX_PACKET(le16_to_cpu(ep->desc.wMaxPacketSize));
+                max_packet = GET_MAX_PACKET(usb_endpoint_maxp(&ep->desc));
                 ep_ctx->ep_info2 |= cpu_to_le32(MAX_PACKET(max_packet));
                 break;
         default:
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 7113d16e2d3..bf0b52c6c96 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2676,7 +2676,7 @@ static u32 xhci_v1_0_td_remainder(int running_total, int trb_buff_len,
          * running_total.
          */
         packets_transferred = (running_total + trb_buff_len) /
-                le16_to_cpu(urb->ep->desc.wMaxPacketSize);
+                usb_endpoint_maxp(&urb->ep->desc);
 
         return xhci_td_remainder(total_packet_count - packets_transferred);
 }
@@ -2706,7 +2706,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
         num_trbs = count_sg_trbs_needed(xhci, urb);
         num_sgs = urb->num_sgs;
         total_packet_count = roundup(urb->transfer_buffer_length,
-                        le16_to_cpu(urb->ep->desc.wMaxPacketSize));
+                        usb_endpoint_maxp(&urb->ep->desc));
 
         trb_buff_len = prepare_transfer(xhci, xhci->devs[slot_id],
                         ep_index, urb->stream_id,
@@ -2913,7 +2913,7 @@ int xhci_queue_bulk_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
 
         running_total = 0;
         total_packet_count = roundup(urb->transfer_buffer_length,
-                        le16_to_cpu(urb->ep->desc.wMaxPacketSize));
+                        usb_endpoint_maxp(&urb->ep->desc));
         /* How much data is in the first TRB? */
         addr = (u64) urb->transfer_dma;
         trb_buff_len = TRB_MAX_BUFF_SIZE -
@@ -3239,7 +3239,7 @@ static int xhci_queue_isoc_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
                 td_remain_len = td_len;
                 /* FIXME: Ignoring zero-length packets, can those happen? */
                 total_packet_count = roundup(td_len,
-                                le16_to_cpu(urb->ep->desc.wMaxPacketSize));
+                                usb_endpoint_maxp(&urb->ep->desc));
                 burst_count = xhci_get_burst_count(xhci, urb->dev, urb,
                                 total_packet_count);
                 residue = xhci_get_last_burst_packet_count(xhci,
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 1c4432d8fc1..f53596b16de 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -987,7 +987,7 @@ static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id,
         out_ctx = xhci->devs[slot_id]->out_ctx;
         ep_ctx = xhci_get_ep_ctx(xhci, out_ctx, ep_index);
         hw_max_packet_size = MAX_PACKET_DECODED(le32_to_cpu(ep_ctx->ep_info2));
-        max_packet_size = le16_to_cpu(urb->dev->ep0.desc.wMaxPacketSize);
+        max_packet_size = usb_endpoint_maxp(&urb->dev->ep0.desc);
         if (hw_max_packet_size != max_packet_size) {
                 xhci_dbg(xhci, "Max Packet Size for ep 0 changed.\n");
                 xhci_dbg(xhci, "Max packet size in usb_device = %d\n",
diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c
index a6afd15f6a4..fe858711651 100644
--- a/drivers/usb/misc/adutux.c
+++ b/drivers/usb/misc/adutux.c
@@ -213,7 +213,7 @@ static void adu_interrupt_in_callback(struct urb *urb)
 
         if (urb->actual_length > 0 && dev->interrupt_in_buffer[0] != 0x00) {
                 if (dev->read_buffer_length <
-                    (4 * le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize)) -
+                    (4 * usb_endpoint_maxp(dev->interrupt_in_endpoint)) -
                      (urb->actual_length)) {
                         memcpy (dev->read_buffer_primary +
                                 dev->read_buffer_length,
@@ -315,7 +315,7 @@ static int adu_open(struct inode *inode, struct file *file)
                          usb_rcvintpipe(dev->udev,
                                         dev->interrupt_in_endpoint->bEndpointAddress),
                          dev->interrupt_in_buffer,
-                         le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize),
+                         usb_endpoint_maxp(dev->interrupt_in_endpoint),
                          adu_interrupt_in_callback, dev,
                          dev->interrupt_in_endpoint->bInterval);
         dev->read_urb_finished = 0;
@@ -483,7 +483,7 @@ static ssize_t adu_read(struct file *file, __user char *buffer, size_t count,
                                                          usb_rcvintpipe(dev->udev,
                                                                         dev->interrupt_in_endpoint->bEndpointAddress),
                                                          dev->interrupt_in_buffer,
-                                                         le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize),
+                                                         usb_endpoint_maxp(dev->interrupt_in_endpoint),
                                                          adu_interrupt_in_callback,
                                                          dev,
                                                          dev->interrupt_in_endpoint->bInterval);
@@ -536,7 +536,7 @@ static ssize_t adu_read(struct file *file, __user char *buffer, size_t count,
                                  usb_rcvintpipe(dev->udev,
                                                 dev->interrupt_in_endpoint->bEndpointAddress),
                                 dev->interrupt_in_buffer,
-                                le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize),
+                                usb_endpoint_maxp(dev->interrupt_in_endpoint),
                                 adu_interrupt_in_callback,
                                 dev,
                                 dev->interrupt_in_endpoint->bInterval);
@@ -622,7 +622,7 @@ static ssize_t adu_write(struct file *file, const __user char *buffer,
                         dbg(4," %s : sending, count = %Zd", __func__, count);
 
                         /* write the data into interrupt_out_buffer from userspace */
-                        buffer_size = le16_to_cpu(dev->interrupt_out_endpoint->wMaxPacketSize);
+                        buffer_size = usb_endpoint_maxp(dev->interrupt_out_endpoint);
                         bytes_to_write = count > buffer_size ? buffer_size : count;
                         dbg(4," %s : buffer_size = %Zd, count = %Zd, bytes_to_write = %Zd",
                             __func__, buffer_size, count, bytes_to_write);
@@ -752,8 +752,8 @@ static int adu_probe(struct usb_interface *interface,
                 goto error;
         }
 
-        in_end_size = le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize);
-        out_end_size = le16_to_cpu(dev->interrupt_out_endpoint->wMaxPacketSize);
+        in_end_size = usb_endpoint_maxp(dev->interrupt_in_endpoint);
+        out_end_size = usb_endpoint_maxp(dev->interrupt_out_endpoint);
 
         dev->read_buffer_primary = kmalloc((4 * in_end_size), GFP_KERNEL);
         if (!dev->read_buffer_primary) {
diff --git a/drivers/usb/misc/ftdi-elan.c b/drivers/usb/misc/ftdi-elan.c
index 2f41089cd85..2dbe600fbc1 100644
--- a/drivers/usb/misc/ftdi-elan.c
+++ b/drivers/usb/misc/ftdi-elan.c
@@ -2777,7 +2777,7 @@ static int ftdi_elan_probe(struct usb_interface *interface,
                 endpoint = &iface_desc->endpoint[i].desc;
                 if (!ftdi->bulk_in_endpointAddr &&
                     usb_endpoint_is_bulk_in(endpoint)) {
-                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                        buffer_size = usb_endpoint_maxp(endpoint);
                         ftdi->bulk_in_size = buffer_size;
                         ftdi->bulk_in_endpointAddr = endpoint->bEndpointAddress;
                         ftdi->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
diff --git a/drivers/usb/misc/idmouse.c b/drivers/usb/misc/idmouse.c
index c6184b4d169..515b67fffab 100644
--- a/drivers/usb/misc/idmouse.c
+++ b/drivers/usb/misc/idmouse.c
@@ -359,7 +359,7 @@ static int idmouse_probe(struct usb_interface *interface,
         endpoint = &iface_desc->endpoint[0].desc;
         if (!dev->bulk_in_endpointAddr && usb_endpoint_is_bulk_in(endpoint)) {
                 /* we found a bulk in endpoint */
-                dev->orig_bi_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                dev->orig_bi_size = usb_endpoint_maxp(endpoint);
                 dev->bulk_in_size = 0x200; /* works _much_ faster */
                 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
                 dev->bulk_in_buffer =
diff --git a/drivers/usb/misc/iowarrior.c b/drivers/usb/misc/iowarrior.c
index a2190b983f5..81457904d6b 100644
--- a/drivers/usb/misc/iowarrior.c
+++ b/drivers/usb/misc/iowarrior.c
@@ -803,7 +803,7 @@ static int iowarrior_probe(struct usb_interface *interface,
                         dev->int_out_endpoint = endpoint;
         }
         /* we have to check the report_size often, so remember it in the endianess suitable for our machine */
-        dev->report_size = le16_to_cpu(dev->int_in_endpoint->wMaxPacketSize);
+        dev->report_size = usb_endpoint_maxp(dev->int_in_endpoint);
         if ((dev->interface->cur_altsetting->desc.bInterfaceNumber == 0) &&
             (dev->product_id == USB_DEVICE_ID_CODEMERCS_IOW56))
                 /* IOWarrior56 has wMaxPacketSize different from report size */
diff --git a/drivers/usb/misc/ldusb.c b/drivers/usb/misc/ldusb.c
index cb4096201e2..48c166f0d76 100644
--- a/drivers/usb/misc/ldusb.c
+++ b/drivers/usb/misc/ldusb.c
@@ -721,7 +721,7 @@ static int ld_usb_probe(struct usb_interface *intf, const struct usb_device_id *
         if (dev->interrupt_out_endpoint == NULL)
                 dev_warn(&intf->dev, "Interrupt out endpoint not found (using control endpoint instead)\n");
 
-        dev->interrupt_in_endpoint_size = le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize);
+        dev->interrupt_in_endpoint_size = usb_endpoint_maxp(dev->interrupt_in_endpoint);
         dev->ring_buffer = kmalloc(ring_buffer_size*(sizeof(size_t)+dev->interrupt_in_endpoint_size), GFP_KERNEL);
         if (!dev->ring_buffer) {
                 dev_err(&intf->dev, "Couldn't allocate ring_buffer\n");
@@ -737,7 +737,7 @@ static int ld_usb_probe(struct usb_interface *intf, const struct usb_device_id *
                 dev_err(&intf->dev, "Couldn't allocate interrupt_in_urb\n");
                 goto error;
         }
-        dev->interrupt_out_endpoint_size = dev->interrupt_out_endpoint ? le16_to_cpu(dev->interrupt_out_endpoint->wMaxPacketSize) :
+        dev->interrupt_out_endpoint_size = dev->interrupt_out_endpoint ? usb_endpoint_maxp(dev->interrupt_out_endpoint) :
                                                                          udev->descriptor.bMaxPacketSize0;
         dev->interrupt_out_buffer = kmalloc(write_buffer_size*dev->interrupt_out_endpoint_size, GFP_KERNEL);
         if (!dev->interrupt_out_buffer) {
diff --git a/drivers/usb/misc/legousbtower.c b/drivers/usb/misc/legousbtower.c
index 6482c6e2e6b..a989356f693 100644
--- a/drivers/usb/misc/legousbtower.c
+++ b/drivers/usb/misc/legousbtower.c
@@ -409,7 +409,7 @@ static int tower_open (struct inode *inode, struct file *file)
                           dev->udev,
                           usb_rcvintpipe(dev->udev, dev->interrupt_in_endpoint->bEndpointAddress),
                           dev->interrupt_in_buffer,
-                          le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize),
+                          usb_endpoint_maxp(dev->interrupt_in_endpoint),
                           tower_interrupt_in_callback,
                           dev,
                           dev->interrupt_in_interval);
@@ -928,7 +928,7 @@ static int tower_probe (struct usb_interface *interface, const struct usb_device
                 err("Couldn't allocate read_buffer");
                 goto error;
         }
-        dev->interrupt_in_buffer = kmalloc (le16_to_cpu(dev->interrupt_in_endpoint->wMaxPacketSize), GFP_KERNEL);
+        dev->interrupt_in_buffer = kmalloc (usb_endpoint_maxp(dev->interrupt_in_endpoint), GFP_KERNEL);
         if (!dev->interrupt_in_buffer) {
                 err("Couldn't allocate interrupt_in_buffer");
                 goto error;
diff --git a/drivers/usb/misc/usblcd.c b/drivers/usb/misc/usblcd.c
index 6ac106952e9..1871cdf10da 100644
--- a/drivers/usb/misc/usblcd.c
+++ b/drivers/usb/misc/usblcd.c
@@ -347,7 +347,7 @@ static int lcd_probe(struct usb_interface *interface,
                 if (!dev->bulk_in_endpointAddr &&
                     usb_endpoint_is_bulk_in(endpoint)) {
                         /* we found a bulk in endpoint */
-                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                        buffer_size = usb_endpoint_maxp(endpoint);
                         dev->bulk_in_size = buffer_size;
                         dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
                         dev->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index bd715006b05..930962f4927 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -1585,8 +1585,8 @@ static struct urb *iso_alloc_urb(
 
         if (bytes < 0 || !desc)
                 return NULL;
-        maxp = 0x7ff & le16_to_cpu(desc->wMaxPacketSize);
-        maxp *= 1 + (0x3 & (le16_to_cpu(desc->wMaxPacketSize) >> 11));
+        maxp = 0x7ff & usb_endpoint_maxp(desc);
+        maxp *= 1 + (0x3 & (usb_endpoint_maxp(desc) >> 11));
         packets = DIV_ROUND_UP(bytes, maxp);
 
         urb = usb_alloc_urb(packets, GFP_KERNEL);
@@ -1656,7 +1656,7 @@ test_iso_queue(struct usbtest_dev *dev, struct usbtest_param *param,
                 "... iso period %d %sframes, wMaxPacket %04x\n",
                 1 << (desc->bInterval - 1),
                 (udev->speed == USB_SPEED_HIGH) ? "micro" : "",
-                le16_to_cpu(desc->wMaxPacketSize));
+                usb_endpoint_maxp(desc));
 
         for (i = 0; i < param->sglen; i++) {
                 urbs[i] = iso_alloc_urb(udev, pipe, desc,
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 8c41a2e6ea7..44b331a74d5 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -1020,7 +1020,7 @@ static int musb_gadget_enable(struct usb_ep *ep,
                 goto fail;
 
         /* REVISIT this rules out high bandwidth periodic transfers */
-        tmp = le16_to_cpu(desc->wMaxPacketSize);
+        tmp = usb_endpoint_maxp(desc);
         if (tmp & ~0x07ff) {
                 int ok;
 
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 8b2473fa0f4..60ddba8066e 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -1932,7 +1932,7 @@ static int musb_urb_enqueue(
         INIT_LIST_HEAD(&qh->ring);
         qh->is_ready = 1;
 
-        qh->maxpacket = le16_to_cpu(epd->wMaxPacketSize);
+        qh->maxpacket = usb_endpoint_maxp(epd);
         qh->type = usb_endpoint_type(epd);
 
         /* Bits 11 & 12 of wMaxPacketSize encode high bandwidth multiplier.
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 78a2cf9551c..8aee28b89c3 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -1480,7 +1480,7 @@ static void ftdi_set_max_packet_size(struct usb_serial_port *port)
         }
 
         /* set max packet size based on descriptor */
-        priv->max_packet_size = le16_to_cpu(ep_desc->wMaxPacketSize);
+        priv->max_packet_size = usb_endpoint_maxp(ep_desc);
 
         dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size);
 }
diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c
index abf095be575..2ee807523f5 100644
--- a/drivers/usb/serial/io_edgeport.c
+++ b/drivers/usb/serial/io_edgeport.c
@@ -3042,7 +3042,7 @@ static int edge_startup(struct usb_serial *serial)
 
                         endpoint = &serial->interface->altsetting[0].
                                                         endpoint[i].desc;
-                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                        buffer_size = usb_endpoint_maxp(endpoint);
                         if (!interrupt_in_found &&
                             (usb_endpoint_is_int_in(endpoint))) {
                                 /* we found a interrupt in endpoint */
@@ -3107,7 +3107,7 @@ static int edge_startup(struct usb_serial *serial)
                                         usb_rcvbulkpipe(dev,
                                                 endpoint->bEndpointAddress),
                                         edge_serial->bulk_in_buffer,
-                                        le16_to_cpu(endpoint->wMaxPacketSize),
+                                        usb_endpoint_maxp(endpoint),
                                         edge_bulk_in_callback,
                                         edge_serial);
                                 bulk_in_found = true;
diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c
index 96423f3c8ef..c248a914743 100644
--- a/drivers/usb/serial/opticon.c
+++ b/drivers/usb/serial/opticon.c
@@ -523,7 +523,7 @@ static int opticon_startup(struct usb_serial *serial)
                         goto error;
                 }
 
-                priv->buffer_size = le16_to_cpu(endpoint->wMaxPacketSize) * 2;
+                priv->buffer_size = usb_endpoint_maxp(endpoint) * 2;
                 priv->bulk_in_buffer = kmalloc(priv->buffer_size, GFP_KERNEL);
                 if (!priv->bulk_in_buffer) {
                         dev_err(&priv->udev->dev, "out of memory\n");
diff --git a/drivers/usb/serial/symbolserial.c b/drivers/usb/serial/symbolserial.c
index d9457bd4fe1..7096f799b07 100644
--- a/drivers/usb/serial/symbolserial.c
+++ b/drivers/usb/serial/symbolserial.c
@@ -226,7 +226,7 @@ static int symbol_startup(struct usb_serial *serial)
                         goto error;
                 }
 
-                priv->buffer_size = le16_to_cpu(endpoint->wMaxPacketSize) * 2;
+                priv->buffer_size = usb_endpoint_maxp(endpoint) * 2;
                 priv->int_buffer = kmalloc(priv->buffer_size, GFP_KERNEL);
                 if (!priv->int_buffer) {
                         dev_err(&priv->udev->dev, "out of memory\n");
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 1c031309ab2..cc274fdf262 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -912,7 +912,7 @@ int usb_serial_probe(struct usb_interface *interface,
                         goto probe_error;
                 }
                 buffer_size = max_t(int, serial->type->bulk_in_size,
-                                le16_to_cpu(endpoint->wMaxPacketSize));
+                                usb_endpoint_maxp(endpoint));
                 port->bulk_in_size = buffer_size;
                 port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
                 port->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
@@ -942,7 +942,7 @@ int usb_serial_probe(struct usb_interface *interface,
                         goto probe_error;
                 buffer_size = serial->type->bulk_out_size;
                 if (!buffer_size)
-                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                        buffer_size = usb_endpoint_maxp(endpoint);
                 port->bulk_out_size = buffer_size;
                 port->bulk_out_endpointAddress = endpoint->bEndpointAddress;
                 port->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
@@ -990,7 +990,7 @@ int usb_serial_probe(struct usb_interface *interface,
                                                 "No free urbs available\n");
                                 goto probe_error;
                         }
-                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                        buffer_size = usb_endpoint_maxp(endpoint);
                         port->interrupt_in_endpointAddress =
                                                 endpoint->bEndpointAddress;
                         port->interrupt_in_buffer = kmalloc(buffer_size,
@@ -1021,7 +1021,7 @@ int usb_serial_probe(struct usb_interface *interface,
                                                 "No free urbs available\n");
                                 goto probe_error;
                         }
-                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                        buffer_size = usb_endpoint_maxp(endpoint);
                         port->interrupt_out_size = buffer_size;
                         port->interrupt_out_endpointAddress =
                                                 endpoint->bEndpointAddress;
diff --git a/drivers/usb/usb-skeleton.c b/drivers/usb/usb-skeleton.c
index e24ce312307..32d6fc95390 100644
--- a/drivers/usb/usb-skeleton.c
+++ b/drivers/usb/usb-skeleton.c
@@ -555,7 +555,7 @@ static int skel_probe(struct usb_interface *interface,
                 if (!dev->bulk_in_endpointAddr &&
                     usb_endpoint_is_bulk_in(endpoint)) {
                         /* we found a bulk in endpoint */
-                        buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+                        buffer_size = usb_endpoint_maxp(endpoint);
                         dev->bulk_in_size = buffer_size;
                         dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
                         dev->bulk_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
diff --git a/drivers/usb/wusbcore/wa-hc.c b/drivers/usb/wusbcore/wa-hc.c
index 59a748a0e5d..0d1863c9edd 100644
--- a/drivers/usb/wusbcore/wa-hc.c
+++ b/drivers/usb/wusbcore/wa-hc.c
@@ -43,7 +43,7 @@ int wa_create(struct wahc *wa, struct usb_interface *iface)
         /* Fill up Data Transfer EP pointers */
         wa->dti_epd = &iface->cur_altsetting->endpoint[1].desc;
         wa->dto_epd = &iface->cur_altsetting->endpoint[2].desc;
-        wa->xfer_result_size = le16_to_cpu(wa->dti_epd->wMaxPacketSize);
+        wa->xfer_result_size = usb_endpoint_maxp(wa->dti_epd);
         wa->xfer_result = kmalloc(wa->xfer_result_size, GFP_KERNEL);
         if (wa->xfer_result == NULL)
                 goto error_xfer_result_alloc;