Messages in this thread | | | Date | Fri, 20 Jan 2023 14:06:28 +0100 | Subject | Re: [PATCH] usb: mtu3: fix the failure of qmu stop | From | AngeloGioacchino Del Regno <> |
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Il 19/01/23 04:33, Chunfeng Yun ha scritto: > This happens when do stress test of uvc stream on/off which will > enable/disable endpoints. uvc has four tx requests, and may disable > endpoint between queue tx requests as following: > enable ep --> start qmu > queue tx request0 > queue tx request1 > queue tx request2 --> resume qmu > disable ep --> stop qmu may fail [1] > queue tx request3 --> will resume qmu, may cause qmu can't work > when enable ep next time [2] > > [1]: when the tx fifo has some data to transmit, and > try to stop qmu (stop ep) meanwhile resume qmu (queue tx request), > it may cause stop qmu timeout, then can be fixed by flushing fifo > when stop qmu. > [2]: it resumes qmu again, shall stop qmu again. > > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> > Reported-by: Min Guo <min.guo@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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