From: Alexey Brodkin Subject: usb: Remove annoying warning about bogus URB When ath9k-htc Wi-Fi dongle is used with generic OHCI controller infinite stream of warnings appears in debug console like this: -------------------------->8---------------------- usb 1-1: new full-speed USB device number 2 using ohci-platform usb 1-1: ath9k_htc: Firmware ath9k_htc/htc_9271-1.4.0.fw requested usb 1-1: ath9k_htc: Transferred FW: ath9k_htc/htc_9271-1.4.0.fw, size: 51008 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 19 at drivers/usb/core/urb.c:449 usb_submit_urb+0x1b4/0x498() usb 1-1: BOGUS urb xfer, pipe 1 != type 3 Modules linked in: CPU: 0 PID: 19 Comm: kworker/0:1 Not tainted 4.4.0-rc4-00017-g00e2d79-dirty #3 Workqueue: events request_firmware_work_func Stack Trace: arc_unwind_core.constprop.1+0xa4/0x110 ---[ end trace 649ef8c342817fc2 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 19 at drivers/usb/core/urb.c:449 usb_submit_urb+0x1b4/0x498() usb 1-1: BOGUS urb xfer, pipe 1 != type 3 Modules linked in: CPU: 0 PID: 19 Comm: kworker/0:1 Tainted: G W 4.4.0-rc4-00017-g00e2d79-dirty #3 Workqueue: events request_firmware_work_func Stack Trace: arc_unwind_core.constprop.1+0xa4/0x110 ---[ end trace 649ef8c342817fc3 ]--- ------------[ cut here ]------------ -------------------------->8---------------------- There're some discussions in mailing lists proposing to disable that particular check alltogether and magically all seem to work fine with muted warning. Anyways new thread on that regard could be found here: http://lists.infradead.org/pipermail/linux-snps-arc/2016-July/001310.html Let's see what comes out of that new discussion, hopefully patching of generic USB stuff won't be required then. Signed-off-by: Alexey Brodkin --- drivers/usb/core/urb.c | 5 ----- 1 file changed, 5 deletions(-) --- a/drivers/usb/core/urb.c +++ b/drivers/usb/core/urb.c @@ -322,9 +322,6 @@ EXPORT_SYMBOL_GPL(usb_unanchor_urb); */ int usb_submit_urb(struct urb *urb, gfp_t mem_flags) { - static int pipetypes[4] = { - PIPE_CONTROL, PIPE_ISOCHRONOUS, PIPE_BULK, PIPE_INTERRUPT - }; int xfertype, max; struct usb_device *dev; struct usb_host_endpoint *ep; @@ -442,11 +439,6 @@ int usb_submit_urb(struct urb *urb, gfp_ * cause problems in HCDs if they get it wrong. */ - /* Check that the pipe's type matches the endpoint's type */ - if (usb_pipetype(urb->pipe) != pipetypes[xfertype]) - dev_WARN(&dev->dev, "BOGUS urb xfer, pipe %x != type %x\n", - usb_pipetype(urb->pipe), pipetypes[xfertype]); - /* Check against a simple/standard policy */ allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_INTERRUPT | URB_DIR_MASK | URB_FREE_BUFFER);