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block-6.16-20250725

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Merge tag 'block-6.16-20250725' of git://git.kernel.dk/linux

Pull block fix from Jens Axboe:
 "Just a single fix for regression in this release, where a module
  reference could be leaked"

* tag 'block-6.16-20250725' of git://git.kernel.dk/linux:
  block: fix module reference leak in mq-deadline I/O scheduler
This commit is contained in:
Linus Torvalds 2025-07-25 08:05:17 -07:00
commit 327579671a
1 changed files with 13 additions and 6 deletions
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19
block/elevator.c
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@ -719,7 +719,8 @@ void elevator_set_default(struct request_queue *q)
.name = "mq-deadline", .name = "mq-deadline",
.no_uevent = true, .no_uevent = true,
}; };
int err = 0; int err;
struct elevator_type *e;
/* now we allow to switch elevator */ /* now we allow to switch elevator */
blk_queue_flag_clear(QUEUE_FLAG_NO_ELV_SWITCH, q); blk_queue_flag_clear(QUEUE_FLAG_NO_ELV_SWITCH, q);
@ -732,12 +733,18 @@ void elevator_set_default(struct request_queue *q)
* have multiple queues or mq-deadline is not available, default * have multiple queues or mq-deadline is not available, default
* to "none". * to "none".
*/ */
if (elevator_find_get(ctx.name) && (q->nr_hw_queues == 1 || e = elevator_find_get(ctx.name);
blk_mq_is_shared_tags(q->tag_set->flags))) if (!e)
return;
if ((q->nr_hw_queues == 1 ||
blk_mq_is_shared_tags(q->tag_set->flags))) {
err = elevator_change(q, &ctx); err = elevator_change(q, &ctx);
if (err < 0) if (err < 0)
pr_warn("\"%s\" elevator initialization, failed %d, " pr_warn("\"%s\" elevator initialization, failed %d, falling back to \"none\"\n",
"falling back to \"none\"\n", ctx.name, err); ctx.name, err);
}
elevator_put(e);
} }
void elevator_set_none(struct request_queue *q) void elevator_set_none(struct request_queue *q)