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| author | Uttkarsh Aggarwal <quic_uaggarwa@quicinc.com> | 2023-12-22 12:47:04 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-01-26 02:35:42 +0300 |
| commit | 73e20c2f48f843a427718b10c6de0e06625135a4 (patch) | |
| tree | c71b34798c53f19beafff4fb50c4aa1bd1f11acf /drivers/usb/dwc3/ep0.c | |
| parent | f09cfc753944924e13af28af804932f2443b515f (diff) | |
| download | linux-73e20c2f48f843a427718b10c6de0e06625135a4.tar.xz | |
usb: dwc: ep0: Update request status in dwc3_ep0_stall_restart
commit e9d40b215e38480fd94c66b06d79045717a59e9c upstream.
Current implementation blocks the running operations when Plug-out and
Plug-In is performed continuously, process gets stuck in
dwc3_thread_interrupt().
Code Flow:
CPU1
->Gadget_start
->dwc3_interrupt
->dwc3_thread_interrupt
->dwc3_process_event_buf
->dwc3_process_event_entry
->dwc3_endpoint_interrupt
->dwc3_ep0_interrupt
->dwc3_ep0_inspect_setup
->dwc3_ep0_stall_and_restart
By this time if pending_list is not empty, it will get the next request
on the given list and calls dwc3_gadget_giveback which will unmap request
and call its complete() callback to notify upper layers that it has
completed. Currently dwc3_gadget_giveback status is set to -ECONNRESET,
whereas it should be -ESHUTDOWN based on condition if not dwc->connected
is true.
Cc: <stable@vger.kernel.org>
Fixes: d742220b3577 ("usb: dwc3: ep0: giveback requests on stall_and_restart")
Signed-off-by: Uttkarsh Aggarwal <quic_uaggarwa@quicinc.com>
Link: https://lore.kernel.org/r/20231222094704.20276-1-quic_uaggarwa@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc3/ep0.c')
| -rw-r--r-- | drivers/usb/dwc3/ep0.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/usb/dwc3/ep0.c b/drivers/usb/dwc3/ep0.c index b94243237293..6ae8a36f21cf 100644 --- a/drivers/usb/dwc3/ep0.c +++ b/drivers/usb/dwc3/ep0.c @@ -238,7 +238,10 @@ void dwc3_ep0_stall_and_restart(struct dwc3 *dwc) struct dwc3_request *req; req = next_request(&dep->pending_list); - dwc3_gadget_giveback(dep, req, -ECONNRESET); + if (!dwc->connected) + dwc3_gadget_giveback(dep, req, -ESHUTDOWN); + else + dwc3_gadget_giveback(dep, req, -ECONNRESET); } dwc->eps[0]->trb_enqueue = 0; |