Keith Busch <keith.busch@xxxxxxxxx> writes:
> The tagset lock needs to be held when iterating the tag_list, so a
> lockdep assert was added when updating number of hardware queues. The
> drivers calling this API, however, were unaware of the new requirement,
> so are failing the assertion.
>
> This patch takes the lock within the blk-mq function so the drivers do
> not have to be modified in order to be safe.
>
> Fixes: 705cda97e ("blk-mq: Make it safe to use RCU to iterate over blk_mq_tag_set.tag_list")
>
> Reported-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxxxx>
> Reviewed-by: Bart Van Assche <Bart.VanAssche@xxxxxxxxxxx>
> Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
I know it is already applied but, FWIW, I can confirm it fixed the issue
in our CI. Feel free to add:
Tested-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxxxx>
Thanks again, Keith.
--
Gabriel Krisman Bertazi
