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| author | Xu Yang <xu.yang_2@nxp.com> | 2024-09-26 10:29:05 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-10-04 15:14:09 +0200 |
| commit | b8c7f7e1884e701df977a315519739c98488345c (patch) | |
| tree | 4f1c0e8e923f196d1aab00737b8d5c76747c7bae /drivers/gpu/drm/amd/amdgpu/atom.c | |
| parent | 548f48b66c0c5d4b9795a55f304b7298cde2a025 (diff) | |
usb: chipidea: udc: improve dTD link logic
Currently, ATDTW semaphore is used to safety link new dTD to dQH. But this
code has a bug when the endpoint is already in error before polling ATDTW
or just met error during polling ATDTW. In that cases, ATDTW will never
turn to 1 and the cpu will busy loop there.
When the endpoint met error, ENDPTSTAT will be cleared by HW. Therefore,
ENDPTSTAT should also be considered during this process. In case of
endpoint error, the current dTD should not be pushed to the head of dQH
since some dTDs may be still not executed. Therefore, the link logic is
also improved accordingly.
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Acked-by: Peter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20240926022906.473319-2-xu.yang_2@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/atom.c')
0 files changed, 0 insertions, 0 deletions