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

Christoph Hellwig
2025-01-09T05:58:50Z

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@lst.de>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
Reviewed-by: Nilay Shroff <nilay@linux.ibm.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@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