usb: fixes for v4.12-rc2

- New device ID for Intel Canonlake CPUs
 - fix for Isochronous performance regression on dwc3
 - fix for out-of-bounds access on comp_desc on f_fs
 - fix for lost events on dwc3 in case of spurious interrupts
 -----BEGIN PGP SIGNATURE-----
 
 iQJRBAABCAA7FiEElLzh7wn96CXwjh2IzL64meEamQYFAlkcAB0dHGZlbGlwZS5i
 YWxiaUBsaW51eC5pbnRlbC5jb20ACgkQzL64meEamQZiCg//drgDsBI5Q3ifA3kg
 v2XR63GAPjjPpsYB8k5sIzzO8zCyPDXX8/q10seYHYFaoPwHrMn+3GebCOtF9rfm
 10eAHk/FgEQm8Q3w/E3fXI0Ma3JgV8Dt4WqwSe3um9VS/OdokTHMchbxSg2TMyyZ
 8mGukfP8rWGm+Gx327Hpo65+8EwPFgFpAlmWdrGWKPyvJ9Q8Sahjb/E9TWfdZlEq
 OHo1C7cHAKMz3bAxfrh5lYI6rrrTw9zskKMJj6SgKAmN091fXM5fMf45yMYzet41
 yNrr1LPT71BqJ1MQ1aLMCt7aqMCActJ0AcY7f8lgPzqGS+Ykjqn8EipGxbWO72ra
 TUVuAtRkJ5aefzZHY7yUCsn7ejVOZ/Ql/MzmuAKKOGlVkC/qaQi2lGQEDU3dFteh
 X/lv/knNzGfIPtKAvp5oAkdWHKJQ3/Ke0t7GGcWQdKj4HOou75/A0ZWLEAIIp0Fi
 WsHp3368qRFTIIWuCpawRVqoNYyPGokJf1y0QarF+vVD4NvyrLWgCVizciLNbOJa
 BWUqrFdr50vUIXof9ik5ZZVgEzG/rLfbp6WZOeB3SEEIvlm3aysEMCJlU50RuQLc
 1dq43zPd9sEivNIgCZF11p5fkurlYzMriBaIDt9b1rB2pKePi661i/B2x+sQ+kWH
 FPgZ1PyjoeABLVyJLjagyzj0zGY=
 =vKMR
 -----END PGP SIGNATURE-----

Merge tag 'fixes-for-v4.12-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-linus

Felipe writes:

usb: fixes for v4.12-rc2

- New device ID for Intel Canonlake CPUs
- fix for Isochronous performance regression on dwc3
- fix for out-of-bounds access on comp_desc on f_fs
- fix for lost events on dwc3 in case of spurious interrupts

drivers/usb/dwc3/dwc3-keystone.c

@@ -107,6 +107,10 @@ static int kdwc3_probe(struct platform_device *pdev)
 		return PTR_ERR(kdwc->usbss);
 
 	kdwc->clk = devm_clk_get(kdwc->dev, "usb");
+	if (IS_ERR(kdwc->clk)) {
+		dev_err(kdwc->dev, "unable to get usb clock\n");
+		return PTR_ERR(kdwc->clk);
+	}
 
 	error = clk_prepare_enable(kdwc->clk);
 	if (error < 0) {

drivers/usb/dwc3/dwc3-pci.c

@@ -39,6 +39,8 @@
 #define PCI_DEVICE_ID_INTEL_APL			0x5aaa
 #define PCI_DEVICE_ID_INTEL_KBP			0xa2b0
 #define PCI_DEVICE_ID_INTEL_GLK			0x31aa
+#define PCI_DEVICE_ID_INTEL_CNPLP		0x9dee
+#define PCI_DEVICE_ID_INTEL_CNPH		0xa36e
 
 #define PCI_INTEL_BXT_DSM_UUID		"732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
 #define PCI_INTEL_BXT_FUNC_PMU_PWR	4
@@ -270,6 +272,8 @@ static const struct pci_device_id dwc3_pci_id_table[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
 	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GLK), },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CNPLP), },
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_CNPH), },
 	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
 	{  }	/* Terminating Entry */
 };

drivers/usb/dwc3/gadget.c

@@ -1261,14 +1261,24 @@ static int __dwc3_gadget_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req)
 				__dwc3_gadget_start_isoc(dwc, dep, cur_uf);
 				dep->flags &= ~DWC3_EP_PENDING_REQUEST;
 			}
+			return 0;
 		}
-		return 0;
+
+		if ((dep->flags & DWC3_EP_BUSY) &&
+		    !(dep->flags & DWC3_EP_MISSED_ISOC)) {
+			WARN_ON_ONCE(!dep->resource_index);
+			ret = __dwc3_gadget_kick_transfer(dep,
+							  dep->resource_index);
+		}
+
+		goto out;
 	}
 
 	if (!dwc3_calc_trbs_left(dep))
 		return 0;
 
 	ret = __dwc3_gadget_kick_transfer(dep, 0);
+out:
 	if (ret == -EBUSY)
 		ret = 0;
 
@@ -3026,6 +3036,15 @@ static irqreturn_t dwc3_check_event_buf(struct dwc3_event_buffer *evt)
 		return IRQ_HANDLED;
 	}
 
+	/*
+	 * With PCIe legacy interrupt, test shows that top-half irq handler can
+	 * be called again after HW interrupt deassertion. Check if bottom-half
+	 * irq event handler completes before caching new event to prevent
+	 * losing events.
+	 */
+	if (evt->flags & DWC3_EVENT_PENDING)
+		return IRQ_HANDLED;
+
 	count = dwc3_readl(dwc->regs, DWC3_GEVNTCOUNT(0));
 	count &= DWC3_GEVNTCOUNT_MASK;
 	if (!count)

drivers/usb/gadget/function/f_fs.c

@@ -1858,12 +1858,12 @@ static int ffs_func_eps_enable(struct ffs_function *func)
 		ep->ep->driver_data = ep;
 		ep->ep->desc = ds;
 
-		comp_desc = (struct usb_ss_ep_comp_descriptor *)(ds +
-				USB_DT_ENDPOINT_SIZE);
-		ep->ep->maxburst = comp_desc->bMaxBurst + 1;
-
-		if (needs_comp_desc)
+		if (needs_comp_desc) {
+			comp_desc = (struct usb_ss_ep_comp_descriptor *)(ds +
+					USB_DT_ENDPOINT_SIZE);
+			ep->ep->maxburst = comp_desc->bMaxBurst + 1;
 			ep->ep->comp_desc = comp_desc;
+		}
 
 		ret = usb_ep_enable(ep->ep);
 		if (likely(!ret)) {

drivers/usb/gadget/function/u_serial.c

@@ -1256,7 +1256,7 @@ static void gserial_console_exit(void)
 	struct gscons_info *info = &gscons_info;
 
 	unregister_console(&gserial_cons);
-	if (info->console_thread != NULL)
+	if (!IS_ERR_OR_NULL(info->console_thread))
 		kthread_stop(info->console_thread);
 	gs_buf_free(&info->con_buf);
 }