Messages in this thread | | | From | Hayes Wang <> | Subject | RE: [PATCH] r8152: stop submitting rx for -EPROTO | Date | Mon, 4 Oct 2021 02:15:44 +0000 |
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Alan Stern <stern@rowland.harvard.edu> > Sent: Friday, October 1, 2021 11:22 PM [...] > That's right. If the device and cable are working properly, this > should never happen. Or only extremely rarely (for example, caused > by external electromagnetic interference). > > > It seems to be reasonable why resubmission sometimes works. > > Did you ever track down the reason why you got the -EPROTO error > while debugging that other issue? Can you reproduce it?
I didn't follow it, because it was not relative to the driver. Besides, we didn't focus on -EPROTO at that time, because it was not the major issue. And the -EPROTO occurred rarely indeed during a lot of transmission. The hw engineer confirmed that the device completed the transfer normally, but the driver still got an error from the host. I don't sure if there was a USB HUB between the device and the USB host controller. That are all what I know.
Best Regards, Hayes
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