Re: [PATCH] scsi/sg: don't grab scsi host module reference

[Bart Van Assche]

On 6/21/23 09:01, Yu Kuai wrote:
> From: Yu Kuai <yukuai3@xxxxxxxxxx>
>
> In order to prevent request_queue to be freed before cleaning up
> blktrace debugfs entries, commit db59133e9279 ("scsi: sg: fix blktrace
> debugfs entries leakage") use scsi_device_get(), however,
> scsi_device_get() will also grab scsi module reference and scsi module
> can't be removed.
>
> It's reported that blktests can't unload scsi_debug after block/001:
>
> blktests (master) # ./check block
> block/001 (stress device hotplugging) [failed]
>       +++ /root/blktests/results/nodev/block/001.out.bad 2023-06-19
>        Running block/001
>        Stressing sd
>       +modprobe: FATAL: Module scsi_debug is in use.
>
> Fix this problem by grabbing request_queue reference directly, so that
> scsi host module can still be unloaded while request_queue will be
> pinged by sg device.

pinged -> pinned

Otherwise this patch looks good to me.

Bart.