[PATCH] erofs: fix PSI memstall accounting

[Chao Yu]

On 2024/11/27 16:52, Gao Xiang wrote:
> Max Kellermann recently reported psi_group_cpu.tasks[NR_MEMSTALL] is
> incorrect in 6.11.9 kernel.
> 
> I think the root cause of the recent issue is that since the problematic
> commit, bio can be NULL so psi_memstall_leave() could be missed in
> z_erofs_submit_queue().
> 
> Reported-by: Max Kellermann <max.kellermann at ionos.com>
> Closes: https://lore.kernel.org/r/CAKPOu+8tvSowiJADW2RuKyofL_CSkm_SuyZA7ME5vMLWmL6pqw@mail.gmail.com
> Fixes: 9e2f9d34dd12 ("erofs: handle overlapped pclusters out of crafted images properly")
> Signed-off-by: Gao Xiang <hsiangkao at linux.alibaba.com>

Reviewed-by: Chao Yu <chao at kernel.org>

Thanks,