Merge tag 'usb-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB updates from Greg KH:
 "Here is the big USB patchset for 4.12-rc1.

  Lots of good stuff here, after many many many attempts, the kernel
  finally has a working typeC interface, many thanks to Heikki and
  Guenter and others who have taken the time to get this merged. It
  wasn't an easy path for them at all.

  There's also a staging driver that uses this new api, which is why
  it's coming in through this tree.

  Along with that, there's the usual huge number of changes for gadget
  drivers, xhci, and other stuff. Johan also finally refactored pretty
  much every driver that was looking at USB endpoints to do it in a
  common way, which will help prevent any "badly-formed" devices from
  causing problems in drivers. That too wasn't a simple task.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'usb-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (263 commits)
  staging: typec: Fairchild FUSB302 Type-c chip driver
  staging: typec: Type-C Port Controller Interface driver (tcpci)
  staging: typec: USB Type-C Port Manager (tcpm)
  usb: host: xhci: remove #ifdef around PM functions
  usb: musb: don't mark of_dev_auxdata as initdata
  usb: misc: legousbtower: Fix buffers on stack
  USB: Revert "cdc-wdm: fix "out-of-sync" due to missing notifications"
  usb: Make sure usb/phy/of gets built-in
  USB: storage: e-mail update in drivers/usb/storage/unusual_devs.h
  usb: host: xhci: print correct command ring address
  usb: host: xhci: delete sp_dma_buffers for scratchpad
  usb: host: xhci: using correct specification chapter reference for DCBAAP
  xhci: switch to pci_alloc_irq_vectors
  usb: host: xhci-plat: set resume_quirk() for R-Car controllers
  usb: host: xhci-plat: add resume_quirk()
  usb: host: xhci-plat: enable clk in resume timing
  usb: host: plat: Enable xHCI plat runtime PM
  USB: serial: ftdi_sio: add device ID for Microsemi/Arrow SF2PLUS Dev Kit
  USB: serial: constify static arrays
  usb: fix some references for /proc/bus/usb
  ...

1 files changed, 14 insertions, 23 deletions

diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c
index cc61055fb9be..fb87c17ed6fa 100644
--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -294,7 +294,7 @@ static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, i
 
 /*
  * See the description for usblp_select_alts() below for the usage
- * explanation.  Look into your /proc/bus/usb/devices and dmesg in
+ * explanation.  Look into your /sys/kernel/debug/usb/devices and dmesg in
  * case of any trouble.
  */
 static int proto_bias = -1;
@@ -1239,8 +1239,9 @@ static int usblp_select_alts(struct usblp *usblp)
 {
 	struct usb_interface *if_alt;
 	struct usb_host_interface *ifd;
-	struct usb_endpoint_descriptor *epd, *epwrite, *epread;
-	int p, i, e;
+	struct usb_endpoint_descriptor *epwrite, *epread;
+	int p, i;
+	int res;
 
 	if_alt = usblp->intf;
 
@@ -1260,31 +1261,21 @@ static int usblp_select_alts(struct usblp *usblp)
 		    ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL)
 			continue;
 
-		/* Look for bulk OUT and IN endpoints. */
-		epwrite = epread = NULL;
-		for (e = 0; e < ifd->desc.bNumEndpoints; e++) {
-			epd = &ifd->endpoint[e].desc;
-
-			if (usb_endpoint_is_bulk_out(epd))
-				if (!epwrite)
-					epwrite = epd;
-
-			if (usb_endpoint_is_bulk_in(epd))
-				if (!epread)
-					epread = epd;
+		/* Look for the expected bulk endpoints. */
+		if (ifd->desc.bInterfaceProtocol > 1) {
+			res = usb_find_common_endpoints(ifd,
+					&epread, &epwrite, NULL, NULL);
+		} else {
+			epread = NULL;
+			res = usb_find_bulk_out_endpoint(ifd, &epwrite);
 		}
 
 		/* Ignore buggy hardware without the right endpoints. */
-		if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread))
+		if (res)
 			continue;
 
-		/*
-		 * Turn off reads for USB_CLASS_PRINTER/1/1 (unidirectional)
-		 * interfaces and buggy bidirectional printers.
-		 */
-		if (ifd->desc.bInterfaceProtocol == 1) {
-			epread = NULL;
-		} else if (usblp->quirks & USBLP_QUIRK_BIDIR) {
+		/* Turn off reads for buggy bidirectional printers. */
+		if (usblp->quirks & USBLP_QUIRK_BIDIR) {
 			printk(KERN_INFO "usblp%d: Disabling reads from "
 			    "problematic bidirectional printer\n",
 			    usblp->minor);