38 files changed, 350 insertions, 141 deletions

diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index f699abab1787..148f3ee70286 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -19,6 +19,12 @@ config USB_EHCI_BIG_ENDIAN_MMIO
 config USB_EHCI_BIG_ENDIAN_DESC
         bool
 
+config USB_UHCI_BIG_ENDIAN_MMIO
+        bool
+
+config USB_UHCI_BIG_ENDIAN_DESC
+        bool
+
 menuconfig USB_SUPPORT
         bool "USB support"
         depends on HAS_IOMEM
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 06b3b54a0e68..7b366a6c0b49 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -174,6 +174,7 @@ static int acm_wb_alloc(struct acm *acm)
                 wb = &acm->wb[wbn];
                 if (!wb->use) {
                         wb->use = 1;
+                        wb->len = 0;
                         return wbn;
                 }
                 wbn = (wbn + 1) % ACM_NW;
@@ -805,16 +806,18 @@ static int acm_tty_write(struct tty_struct *tty,
 static void acm_tty_flush_chars(struct tty_struct *tty)
 {
         struct acm *acm = tty->driver_data;
-        struct acm_wb *cur = acm->putbuffer;
+        struct acm_wb *cur;
         int err;
         unsigned long flags;
 
+        spin_lock_irqsave(&acm->write_lock, flags);
+
+        cur = acm->putbuffer;
         if (!cur) /* nothing to do */
-                return;
+                goto out;
 
         acm->putbuffer = NULL;
         err = usb_autopm_get_interface_async(acm->control);
-        spin_lock_irqsave(&acm->write_lock, flags);
         if (err < 0) {
                 cur->use = 0;
                 acm->putbuffer = cur;
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 4024926c1d68..f4a548471f0f 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -226,6 +226,9 @@ static const struct usb_device_id usb_quirk_list[] = {
         { USB_DEVICE(0x1a0a, 0x0200), .driver_info =
                         USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL },
 
+        /* Corsair K70 RGB */
+        { USB_DEVICE(0x1b1c, 0x1b13), .driver_info = USB_QUIRK_DELAY_INIT },
+
         /* Corsair Strafe RGB */
         { USB_DEVICE(0x1b1c, 0x1b20), .driver_info = USB_QUIRK_DELAY_INIT },
 
diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
index e4c3ce0de5de..5bcad1d869b5 100644
--- a/drivers/usb/dwc2/gadget.c
+++ b/drivers/usb/dwc2/gadget.c
@@ -1917,7 +1917,9 @@ static void dwc2_hsotg_program_zlp(struct dwc2_hsotg *hsotg,
                 /* Not specific buffer needed for ep0 ZLP */
                 dma_addr_t dma = hs_ep->desc_list_dma;
 
-                dwc2_gadget_set_ep0_desc_chain(hsotg, hs_ep);
+                if (!index)
+                        dwc2_gadget_set_ep0_desc_chain(hsotg, hs_ep);
+
                 dwc2_gadget_config_nonisoc_xfer_ddma(hs_ep, dma, 0);
         } else {
                 dwc2_writel(DXEPTSIZ_MC(1) | DXEPTSIZ_PKTCNT(1) |
@@ -2974,9 +2976,13 @@ static void dwc2_hsotg_epint(struct dwc2_hsotg *hsotg, unsigned int idx,
         if (ints & DXEPINT_STSPHSERCVD) {
                 dev_dbg(hsotg->dev, "%s: StsPhseRcvd\n", __func__);
 
-                /* Move to STATUS IN for DDMA */
-                if (using_desc_dma(hsotg))
-                        dwc2_hsotg_ep0_zlp(hsotg, true);
+                /* Safety check EP0 state when STSPHSERCVD asserted */
+                if (hsotg->ep0_state == DWC2_EP0_DATA_OUT) {
+                        /* Move to STATUS IN for DDMA */
+                        if (using_desc_dma(hsotg))
+                                dwc2_hsotg_ep0_zlp(hsotg, true);
+                }
+
         }
 
         if (ints & DXEPINT_BACK2BACKSETUP)
@@ -3375,12 +3381,6 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
         dwc2_writel(dwc2_hsotg_ep0_mps(hsotg->eps_out[0]->ep.maxpacket) |
                DXEPCTL_USBACTEP, hsotg->regs + DIEPCTL0);
 
-        dwc2_hsotg_enqueue_setup(hsotg);
-
-        dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
-                dwc2_readl(hsotg->regs + DIEPCTL0),
-                dwc2_readl(hsotg->regs + DOEPCTL0));
-
         /* clear global NAKs */
         val = DCTL_CGOUTNAK | DCTL_CGNPINNAK;
         if (!is_usb_reset)
@@ -3391,6 +3391,12 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
         mdelay(3);
 
         hsotg->lx_state = DWC2_L0;
+
+        dwc2_hsotg_enqueue_setup(hsotg);
+
+        dev_dbg(hsotg->dev, "EP0: DIEPCTL0=0x%08x, DOEPCTL0=0x%08x\n",
+                dwc2_readl(hsotg->regs + DIEPCTL0),
+                dwc2_readl(hsotg->regs + DOEPCTL0));
 }
 
 static void dwc2_hsotg_core_disconnect(struct dwc2_hsotg *hsotg)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index ade2ab00d37a..f1d838a4acd6 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -100,6 +100,8 @@ static void dwc3_set_prtcap(struct dwc3 *dwc, u32 mode)
         reg &= ~(DWC3_GCTL_PRTCAPDIR(DWC3_GCTL_PRTCAP_OTG));
         reg |= DWC3_GCTL_PRTCAPDIR(mode);
         dwc3_writel(dwc->regs, DWC3_GCTL, reg);
+
+        dwc->current_dr_role = mode;
 }
 
 static void __dwc3_set_mode(struct work_struct *work)
@@ -133,8 +135,6 @@ static void __dwc3_set_mode(struct work_struct *work)