This is a note to let you know that I've just added the patch titled usb: dwc3: gadget: skip Set/Clear Halt when invalid to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-dwc3-gadget-skip-set-clear-halt-when-invalid.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From ffb80fc672c3a7b6afd0cefcb1524fb99917b2f3 Mon Sep 17 00:00:00 2001 From: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Date: Thu, 19 Jan 2017 13:38:42 +0200 Subject: usb: dwc3: gadget: skip Set/Clear Halt when invalid From: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> commit ffb80fc672c3a7b6afd0cefcb1524fb99917b2f3 upstream. At least macOS seems to be sending ClearFeature(ENDPOINT_HALT) to endpoints which aren't Halted. This makes DWC3's CLEARSTALL command time out which causes several issues for the driver. Instead, let's just return 0 and bail out early. Signed-off-by: Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/dwc3/gadget.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1234,6 +1234,9 @@ int __dwc3_gadget_ep_set_halt(struct dwc unsigned transfer_in_flight; unsigned started; + if (dep->flags & DWC3_EP_STALL) + return 0; + if (dep->number > 1) trb = dwc3_ep_prev_trb(dep, dep->trb_enqueue); else @@ -1258,6 +1261,8 @@ int __dwc3_gadget_ep_set_halt(struct dwc else dep->flags |= DWC3_EP_STALL; } else { + if (!(dep->flags & DWC3_EP_STALL)) + return 0; ret = dwc3_send_clear_stall_ep_cmd(dep); if (ret) Patches currently in stable-queue which might be from felipe.balbi@xxxxxxxxxxxxxxx are queue-4.9/usb-gadget-udc-fsl-add-missing-complete-function.patch queue-4.9/usb-gadget-f_hid-use-spinlock-instead-of-mutex.patch queue-4.9/usb-gadget-f_hid-fix-free-out-requests.patch queue-4.9/usb-gadget-f_hid-fix-prevent-accessing-released-memory.patch queue-4.9/usb-gadget-udc-core-rescan-pending-list-on-driver-unbind.patch queue-4.9/usb-dwc3-gadget-skip-set-clear-halt-when-invalid.patch