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authorMathias Nyman <mathias.nyman@linux.intel.com>2021-05-25 10:41:00 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-05-25 11:21:47 +0300
commita7f2e9272aff1ccfe0fc801dab1d5a7a1c6b7ed2 (patch)
treed66df09b04bceb4a37c8f9c19a90a833a394fa37 /fs/stat.c
parenta80c203c3f1c06d2201c19ae071d0ae770a2b1ca (diff)
downloadlinux-a7f2e9272aff1ccfe0fc801dab1d5a7a1c6b7ed2.tar.xz
xhci: Fix 5.12 regression of missing xHC cache clearing command after a Stall
If endpoints halts due to a stall then the dequeue pointer read from hardware may already be set ahead of the stalled TRB. After commit 674f8438c121 ("xhci: split handling halted endpoints into two steps") in 5.12 xhci driver won't issue a Set TR Dequeue if hardware dequeue pointer is already in the right place. Turns out the "Set TR Dequeue pointer" command is anyway needed as it in addition to moving the dequeue pointer also clears endpoint state and cache. Fixes: 674f8438c121 ("xhci: split handling halted endpoints into two steps") Cc: <stable@vger.kernel.org> # 5.12 Reported-by: Peter Ganzhorn <peter.ganzhorn@googlemail.com> Tested-by: Peter Ganzhorn <peter.ganzhorn@googlemail.com> Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com> Link: https://lore.kernel.org/r/20210525074100.1154090-3-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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