usb: dwc3: Avoid unmapping USB requests if endxfer is not complete

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If DWC3_EP_DELAYED_STOP is set during stop active transfers, then do not
continue attempting to unmap request buffers during dwc3_remove_requests().
This can lead to SMMU faults, as the controller has not stopped the
processing of the TRB.  Defer this sequence to the EP0 out start, which
ensures that there are no pending SETUP transactions before issuing the
endxfer.

Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Wesley Cheng <quic_wcheng@quicinc.com>
Link: https://lore.kernel.org/r/20220901193625.8727-2-quic_wcheng@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Wesley Cheng 2022-09-01 12:36:21 -07:00 • committed by Greg Kroah-Hartman

parent 787f51f210

commit 2b2da6574e

3 changed files with 10 additions and 2 deletions

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1

drivers/usb/dwc3/core.h

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5

drivers/usb/dwc3/ep0.c

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6

drivers/usb/dwc3/gadget.c

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