blk-mq: Make blk_mq_quiesce_tagset() hold the tag list mutex less long

Make sure that the tag_list_lock mutex is not held any longer than
necessary. This change reduces latency if e.g. blk_mq_quiesce_tagset()
is called concurrently from more than one thread. This function is used
by the NVMe core and also by the UFS driver.

Reported-by: Peter Wang <[email protected]>
Cc: Chao Leng <[email protected]>
Cc: Ming Lei <[email protected]>
Cc: [email protected]
Fixes: 414dd48e882c ("blk-mq: add tagset quiesce interface")
Signed-off-by: Bart Van Assche <[email protected]>
Reviewed-by: Keith Busch <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jens Axboe <[email protected]>

0 files changed, 0 insertions, 0 deletions