[PATCH 09/11] usb-storage: fix queue freeze vs limits lock order

[Christoph Hellwig]

Match the locking order used by the core block code by only freezing
the queue after taking the limits lock using the
queue_limits_commit_update_frozen helper.

Signed-off-by: Christoph Hellwig <hch at lst.de>
Reviewed-by: Ming Lei <ming.lei at redhat.com>
Reviewed-by: Damien Le Moal <dlemoal at kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen at oracle.com>
Reviewed-by: Nilay Shroff <nilay at linux.ibm.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn at wdc.com>
---
 drivers/usb/storage/scsiglue.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c
index 8c8b5e6041cc..dc98ceecb724 100644
--- a/drivers/usb/storage/scsiglue.c
+++ b/drivers/usb/storage/scsiglue.c
@@ -592,12 +592,9 @@ static ssize_t max_sectors_store(struct device *dev, struct device_attribute *at
 	if (sscanf(buf, "%hu", &ms) <= 0)
 		return -EINVAL;
 
-	blk_mq_freeze_queue(sdev->request_queue);
 	lim = queue_limits_start_update(sdev->request_queue);
 	lim.max_hw_sectors = ms;
-	ret = queue_limits_commit_update(sdev->request_queue, &lim);
-	blk_mq_unfreeze_queue(sdev->request_queue);
-
+	ret = queue_limits_commit_update_frozen(sdev->request_queue, &lim);
 	if (ret)
 		return ret;
 	return count;
-- 
2.45.2