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| author | Pawel Laszczak <pawell@cadence.com> | 2022-08-25 08:22:07 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-30 15:33:14 +0200 |
| commit | d5dcc33677d7415c5f23b3c052f9e80cbab9ea4e (patch) | |
| tree | 845f76495cda2a1bf778569fb836efe9798280b9 /drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | |
| parent | 9d4dc16ec71bd6368548e9743223e449b4377fc7 (diff) | |
usb: cdns3: fix incorrect handling TRB_SMM flag for ISOC transfer
The TRB_SMM flag indicates that DMA has completed the TD service with
this TRB. Usually it’s a last TRB in TD. In case of ISOC transfer for
bInterval > 1 each ISOC transfer contains more than one TD associated
with usb request (one TD per ITP). In such case the TRB_SMM flag will
be set in every TD and driver will recognize the end of transfer after
processing the first TD with TRB_SMM. In result driver stops updating
request->actual and returns incorrect actual length.
To fix this issue driver additionally must check TRB_CHAIN which is not
used for isochronous transfers.
Fixes: 249f0a25e8be ("usb: cdns3: gadget: handle sg list use case at completion correctly")
cc: <stable@vger.kernel.org>
Acked-by: Peter Chen <peter.chen@kernel.org>
Signed-off-by: Pawel Laszczak <pawell@cadence.com>
Link: https://lore.kernel.org/r/20220825062207.5824-1-pawell@cadence.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
0 files changed, 0 insertions, 0 deletions