[PATCH] USB: gadget driver updates (SETUP api change)

This updates most of the gadget framework to expect SETUP packets use
USB byteorder (matching the annotation in <linux/usb_ch9.h> and usage
in the host side stack):

  - definition in <linux/usb_gadget.h>
  - gadget drivers:  Ethernet/RNDIS, serial/ACM, file_storage, gadgetfs.
  - dummy_hcd

It also includes some other similar changes as suggested by "sparse",
which was used to detect byteorder bugs.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

6 files changed, 40 insertions, 42 deletions

diff --git a/drivers/usb/gadget/dummy_hcd.c b/drivers/usb/gadget/dummy_hcd.c
index 73d2f24050ab..f9540adf2a4f 100644
--- a/drivers/usb/gadget/dummy_hcd.c
+++ b/drivers/usb/gadget/dummy_hcd.c
@@ -1267,9 +1267,6 @@ restart:
                         struct dummy_ep                 *ep2;
 
                         setup = *(struct usb_ctrlrequest*) urb->setup_packet;
-                        le16_to_cpus (&setup.wIndex);
-                        le16_to_cpus (&setup.wValue);
-                        le16_to_cpus (&setup.wLength);
                         if (setup.wLength != urb->transfer_buffer_length) {
                                 maybe_set_status (urb, -EOVERFLOW);
                                 goto return_urb;
diff --git a/drivers/usb/gadget/ether.c b/drivers/usb/gadget/ether.c
index 3830a0a0fd50..9f8413e3c10a 100644
--- a/drivers/usb/gadget/ether.c
+++ b/drivers/usb/gadget/ether.c
@@ -1277,9 +1277,9 @@ eth_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
         struct eth_dev          *dev = get_gadget_data (gadget);
         struct usb_request      *req = dev->req;
         int                     value = -EOPNOTSUPP;
-        u16                     wIndex = (__force u16) ctrl->wIndex;
-        u16                     wValue = (__force u16) ctrl->wValue;
-        u16                     wLength = (__force u16) ctrl->wLength;
+        u16                     wIndex = le16_to_cpu(ctrl->wIndex);
+        u16                     wValue = le16_to_cpu(ctrl->wValue);
+        u16                     wLength = le16_to_cpu(ctrl->wLength);
 
         /* descriptors just go into the pre-allocated ep0 buffer,
          * while config change events may enable network traffic.
diff --git a/drivers/usb/gadget/file_storage.c b/drivers/usb/gadget/file_storage.c
index f5ce45c4b2a3..4f57085619b4 100644
--- a/drivers/usb/gadget/file_storage.c
+++ b/drivers/usb/gadget/file_storage.c
@@ -819,7 +819,7 @@ static void inline put_be32(u8 *buf, u32 val)
         buf[0] = val >> 24;
         buf[1] = val >> 16;
         buf[2] = val >> 8;
-        buf[3] = val;
+        buf[3] = val & 0xff;
 }
 
 
@@ -1277,8 +1277,8 @@ static int class_setup_req(struct fsg_dev *fsg,
 {
         struct usb_request      *req = fsg->ep0req;
         int                     value = -EOPNOTSUPP;
-        u16                     w_index = ctrl->wIndex;
-        u16                     w_length = ctrl->wLength;
+        u16                     w_index = le16_to_cpu(ctrl->wIndex);
+        u16                     w_length = le16_to_cpu(ctrl->wLength);
 
         if (!fsg->config)
                 return value;
@@ -1345,7 +1345,7 @@ static int class_setup_req(struct fsg_dev *fsg,
                         "unknown class-specific control req "
                         "%02x.%02x v%04x i%04x l%u\n",
                         ctrl->bRequestType, ctrl->bRequest,
-                        ctrl->wValue, w_index, w_length);
+                        le16_to_cpu(ctrl->wValue), w_index, w_length);
         return value;
 }
 
@@ -1359,8 +1359,8 @@ static int standard_setup_req(struct fsg_dev *fsg,
 {
         struct usb_request      *req = fsg->ep0req;
         int                     value = -EOPNOTSUPP;
-        u16                     w_index = ctrl->wIndex;
-        u16                     w_value = ctrl->wValue;
+        u16                     w_index = le16_to_cpu(ctrl->wIndex);
+        u16                     w_value = le16_to_cpu(ctrl->wValue);
 
         /* Usually this just stores reply data in the pre-allocated ep0 buffer,
          * but config change events will also reconfigure hardware. */
@@ -1469,7 +1469,7 @@ static int standard_setup_req(struct fsg_dev *fsg,
                 VDBG(fsg,
                         "unknown control req %02x.%02x v%04x i%04x l%u\n",
                         ctrl->bRequestType, ctrl->bRequest,
-                        w_value, w_index, ctrl->wLength);
+                        w_value, w_index, le16_to_cpu(ctrl->wLength));
         }
 
         return value;
@@ -1481,7 +1481,7 @@ static int fsg_setup(struct usb_gadget *gadget,
 {
         struct fsg_dev          *fsg = get_gadget_data(gadget);
         int                     rc;
-        int                     w_length = ctrl->wLength;
+        int                     w_length = le16_to_cpu(ctrl->wLength);
 
         ++fsg->ep0_req_tag;             // Record arrival of a new request
         fsg->ep0req->context = NULL;
@@ -1497,8 +1497,7 @@ static int fsg_setup(struct usb_gadget *gadget,
         if (rc >= 0 && rc != DELAYED_STATUS) {
                 rc = min(rc, w_length);
                 fsg->ep0req->length = rc;
-                fsg->ep0req->zero = (rc < w_length &&
-                                (rc % gadget->ep0->maxpacket) == 0);
+                fsg->ep0req->zero = rc < w_length;
                 fsg->ep0req_name = (ctrl->bRequestType & USB_DIR_IN ?
                                 "ep0-in" : "ep0-out");
                 rc = ep0_queue(fsg);
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index 1e5e6ddef787..020815397a49 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -417,8 +417,8 @@ ep_read (struct file *fd, char __user *buf, size_t len, loff_t *ptr)
                 goto free1;
 
         value = ep_io (data, kbuf, len);
-        VDEBUG (data->dev, "%s read %d OUT, status %d\n",
-                data->name, len, value);
+        VDEBUG (data->dev, "%s read %zu OUT, status %d\n",
+                data->name, len, (int) value);
         if (value >= 0 && copy_to_user (buf, kbuf, value))
                 value = -EFAULT;
 
@@ -465,8 +465,8 @@ ep_write (struct file *fd, const char __user *buf, size_t len, loff_t *ptr)
         }
 
         value = ep_io (data, kbuf, len);
-        VDEBUG (data->dev, "%s write %d IN, status %d\n",
-                data->name, len, value);
+        VDEBUG (data->dev, "%s write %zu IN, status %d\n",
+                data->name, len, (int) value);
 free1:
         up (&data->lock);
         kfree (kbuf);
@@ -1318,8 +1318,8 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
         struct usb_request              *req = dev->req;
         int                             value = -EOPNOTSUPP;
         struct usb_gadgetfs_event       *event;
-        u16                             w_value = ctrl->wValue;
-        u16                             w_length = ctrl->wLength;
+        u16                             w_value = le16_to_cpu(ctrl->wValue);
+        u16                             w_length = le16_to_cpu(ctrl->wLength);
 
         spin_lock (&dev->lock);
         dev->setup_abort = 0;
diff --git a/drivers/usb/gadget/serial.c b/drivers/usb/gadget/serial.c
index 4d591c764e38..9e4f1c6935a5 100644
--- a/drivers/usb/gadget/serial.c
+++ b/drivers/usb/gadget/serial.c
@@ -300,18 +300,18 @@ static int gs_build_config_buf(u8 *buf, enum usb_device_speed speed,
                 u8 type, unsigned int index, int is_otg);
 
 static struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned int len,
-        int kmalloc_flags);
+        unsigned kmalloc_flags);
 static void gs_free_req(struct usb_ep *ep, struct usb_request *req);
 
 static struct gs_req_entry *gs_alloc_req_entry(struct usb_ep *ep, unsigned len,
-        int kmalloc_flags);
+        unsigned kmalloc_flags);
 static void gs_free_req_entry(struct usb_ep *ep, struct gs_req_entry *req);
 
-static int gs_alloc_ports(struct gs_dev *dev, int kmalloc_flags);
+static int gs_alloc_ports(struct gs_dev *dev, unsigned kmalloc_flags);
 static void gs_free_ports(struct gs_dev *dev);
 
 /* circular buffer */
-static struct gs_buf *gs_buf_alloc(unsigned int size, int kmalloc_flags);
+static struct gs_buf *gs_buf_alloc(unsigned int size, unsigned kmalloc_flags);
 static void gs_buf_free(struct gs_buf *gb);
 static void gs_buf_clear(struct gs_buf *gb);
 static unsigned int gs_buf_data_avail(struct gs_buf *gb);
@@ -1607,9 +1607,9 @@ static int gs_setup(struct usb_gadget *gadget,
         int ret = -EOPNOTSUPP;
         struct gs_dev *dev = get_gadget_data(gadget);
         struct usb_request *req = dev->dev_ctrl_req;
-        u16 wIndex = ctrl->wIndex;
-        u16 wValue = ctrl->wValue;
-        u16 wLength = ctrl->wLength;
+        u16 wIndex = le16_to_cpu(ctrl->wIndex);
+        u16 wValue = le16_to_cpu(ctrl->wValue);
+        u16 wLength = le16_to_cpu(ctrl->wLength);
 
         switch (ctrl->bRequestType & USB_TYPE_MASK) {
         case USB_TYPE_STANDARD:
@@ -1651,9 +1651,9 @@ static int gs_setup_standard(struct usb_gadget *gadget,
         int ret = -EOPNOTSUPP;
         struct gs_dev *dev = get_gadget_data(gadget);
         struct usb_request *req = dev->dev_ctrl_req;
-        u16 wIndex = ctrl->wIndex;
-        u16 wValue = ctrl->wValue;
-        u16 wLength = ctrl->wLength;
+        u16 wIndex = le16_to_cpu(ctrl->wIndex);
+        u16 wValue = le16_to_cpu(ctrl->wValue);
+        u16 wLength = le16_to_cpu(ctrl->wLength);
 
         switch (ctrl->bRequest) {
         case USB_REQ_GET_DESCRIPTOR:
@@ -1782,9 +1782,9 @@ static int gs_setup_class(struct usb_gadget *gadget,
         struct gs_dev *dev = get_gadget_data(gadget);
         struct gs_port *port = dev->dev_port[0];        /* ACM only has one port */
         struct usb_request *req = dev->dev_ctrl_req;
-        u16 wIndex = ctrl->wIndex;
-        u16 wValue = ctrl->wValue;
-        u16 wLength = ctrl->wLength;
+        u16 wIndex = le16_to_cpu(ctrl->wIndex);
+        u16 wValue = le16_to_cpu(ctrl->wValue);
+        u16 wLength = le16_to_cpu(ctrl->wLength);
 
         switch (ctrl->bRequest) {
         case USB_CDC_REQ_SET_LINE_CODING:
@@ -2119,7 +2119,8 @@ static int gs_build_config_buf(u8 *buf, enum usb_device_speed speed,
  * Allocate a usb_request and its buffer.  Returns a pointer to the
  * usb_request or NULL if there is an error.
  */
-static struct usb_request *gs_alloc_req(struct usb_ep *ep, unsigned int len, int kmalloc_flags)
+static struct usb_request *
+gs_alloc_req(struct usb_ep *ep, unsigned int len, unsigned kmalloc_flags)
 {
         struct usb_request *req;
 
@@ -2159,7 +2160,8 @@ static void gs_free_req(struct usb_ep *ep, struct usb_request *req)
  * Allocates a request and its buffer, using the given
  * endpoint, buffer len, and kmalloc flags.
  */
-static struct gs_req_entry *gs_alloc_req_entry(struct usb_ep *ep, unsigned len, int kmalloc_flags)
+static struct gs_req_entry *
+gs_alloc_req_entry(struct usb_ep *ep, unsigned len, unsigned kmalloc_flags)
 {
         struct gs_req_entry     *req;
 
@@ -2200,7 +2202,7 @@ static void gs_free_req_entry(struct usb_ep *ep, struct gs_req_entry *req)
  *
  * The device lock is normally held when calling this function.
  */
-static int gs_alloc_ports(struct gs_dev *dev, int kmalloc_flags)
+static int gs_alloc_ports(struct gs_dev *dev, unsigned kmalloc_flags)
 {
         int i;
         struct gs_port *port;
@@ -2282,7 +2284,7 @@ static void gs_free_ports(struct gs_dev *dev)
  *
  * Allocate a circular buffer and all associated memory.
  */
-static struct gs_buf *gs_buf_alloc(unsigned int size, int kmalloc_flags)
+static struct gs_buf *gs_buf_alloc(unsigned int size, unsigned kmalloc_flags)
 {
         struct gs_buf *gb;
 
diff --git a/drivers/usb/gadget/zero.c b/drivers/usb/gadget/zero.c
index 6e49432071a1..a6e035e24479 100644
--- a/drivers/usb/gadget/zero.c
+++ b/drivers/usb/gadget/zero.c
@@ -919,9 +919,9 @@ zero_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
         struct zero_dev         *dev = get_gadget_data (gadget);
         struct usb_request      *req = dev->req;
         int                     value = -EOPNOTSUPP;
-        u16                     w_index = ctrl->wIndex;
-        u16                     w_value = ctrl->wValue;
-        u16                     w_length = ctrl->wLength;
+        u16                     w_index = le16_to_cpu(ctrl->wIndex);
+        u16                     w_value = le16_to_cpu(ctrl->wValue);
+        u16                     w_length = le16_to_cpu(ctrl->wLength);
 
         /* usually this stores reply data in the pre-allocated ep0 buffer,
          * but config change events will reconfigure hardware.