[PATCH v4 01/13] blk-mq: Change rqs check in blk_mq_free_rqs()

From: John Garry
Date: Fri Sep 24 2021 - 04:33:39 EST


The original code in commit 24d2f90309b23 ("blk-mq: split out tag
initialization, support shared tags") would check tags->rqs is non-NULL and
then dereference tags->rqs[].

Then in commit 2af8cbe30531 ("blk-mq: split tag ->rqs[] into two"), we
started to dereference tags->static_rqs[], but continued to check non-NULL
tags->rqs.

Check tags->static_rqs as non-NULL instead, which is more logical.

Signed-off-by: John Garry <john.garry@xxxxxxxxxx>
Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
---
block/blk-mq.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 108a352051be..2316ff27c1f5 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2340,7 +2340,7 @@ void blk_mq_free_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
{
struct page *page;

- if (tags->rqs && set->ops->exit_request) {
+ if (tags->static_rqs && set->ops->exit_request) {
int i;

for (i = 0; i < tags->nr_tags; i++) {
--
2.26.2