xhci: handle halting transfer event properly after endpoint stop and halt raced.

Browse source

If we receive a transfer event indicating that an endpoint should be
halted, but current endpoint state doesn't match it, then the halt might
be just resolved by the stop endpoint completion handler that detects the
halted endpoint due to a context state error.

In this case the TD we halted on is already moved to the cancelled TD list,
and should not be successfully completed and given back anymore.
Let the stop endpoint completion handler reset the endpoint, and then let
the reset endpoint handler give back the cancelled TD among all other
ones on the cancelled TD list

Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20210129130044.206855-28-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Mathias Nyman 2021-01-29 15:00:44 +02:00 • committed by Greg Kroah-Hartman

parent 51ee4a8430

commit 3c648d3deb

1 changed files with 52 additions and 16 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

68

drivers/usb/host/xhci-ring.c

View file