Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 29 Feb 2024 12:52:18 +0100 | Subject | Re: [PATCH v3] USB:UAS:return ENODEV when submit urbs fail with device not attached | From | Oliver Neukum <> |
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On 29.02.24 20:33, Weitao Wang wrote: > In the scenario of entering hibernation with udisk in the system, if the > udisk was gone or resume fail in the thaw phase of hibernation. Its state > will be set to NOTATTACHED. At this point, usb_hub_wq was already freezed > and can't not handle disconnect event. Next, in the poweroff phase of > hibernation, SYNCHRONIZE_CACHE SCSI command will be sent to this udisk > when poweroff this scsi device, which will cause uas_submit_urbs to be > called to submit URB for sense/data/cmd pipe. However, these URBs will > submit fail as device was set to NOTATTACHED state. Then, uas_submit_urbs > will return a value SCSI_MLQUEUE_DEVICE_BUSY to the caller. That will lead > the SCSI layer go into an ugly loop and system fail to go into hibernation. > > On the other hand, when we specially check for -ENODEV in function > uas_queuecommand_lck, returning DID_ERROR to SCSI layer will cause device > poweroff fail and system shutdown instead of entering hibernation. > > To fix this issue, let uas_submit_urbs to return original generic error > when submitting URB failed. At the same time, we need to translate -ENODEV > to DID_NOT_CONNECT for the SCSI layer. > > Suggested-by: Oliver Neukum<oneukum@suse.com> > Cc:stable@vger.kernel.org > Signed-off-by: Weitao Wang<WeitaoWang-oc@zhaoxin.com> Acked-by: Oliver Neukum <oneukum@suse.com>
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