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authorOmar Sandoval <osandov@fb.com>2017-04-07 08:52:27 -0600
committerJens Axboe <axboe@fb.com>2017-04-07 08:56:48 -0600
commit54d5329d425650fafaf90660a139c771d2d49cae (patch)
tree3fc6db73809742be0f0fdf403c77af02a6feeeba /include/linux
parent93252632e828da3e90241a1c0e766556abf71598 (diff)
blk-mq-sched: fix crash in switch error path
In elevator_switch(), if blk_mq_init_sched() fails, we attempt to fall back to the original scheduler. However, at this point, we've already torn down the original scheduler's tags, so this causes a crash. Doing the fallback like the legacy elevator path is much harder for mq, so fix it by just falling back to none, instead. Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/elevator.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index aebecc4ed088..22d39e8d4de1 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -211,7 +211,7 @@ extern ssize_t elv_iosched_show(struct request_queue *, char *);
extern ssize_t elv_iosched_store(struct request_queue *, const char *, size_t);
extern int elevator_init(struct request_queue *, char *);
-extern void elevator_exit(struct elevator_queue *);
+extern void elevator_exit(struct request_queue *, struct elevator_queue *);
extern int elevator_change(struct request_queue *, const char *);
extern bool elv_bio_merge_ok(struct request *, struct bio *);
extern struct elevator_queue *elevator_alloc(struct request_queue *,