scsi_requeue_command and dropping reference to sdev_gendev

[Ani Sinha <ani@xxxxxxxxxxxxxxxxxx>]

Hi :

I am looking at the latest upstream code and I see a potential issue :

- scsi_requeue_command() drops reference to scsi_device->sdev_gendev in
scsi_unprep_request->scsi_put_command()->__scsi_put_command(). This can
trigger the cleanup routine scsi_device_dev_release_usercontext() that
will deallocate the sdev->request_queue in blk_put_queue() call. This can
cause potential problems in scsi_requeue_command() when it calls
scsi_run_queue().

Am I missing something here?

Any suggestion will be greatly appreciated.

Thanks,
Ani
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