diff options
Diffstat (limited to 'block/blk-sysfs.c')
| -rw-r--r-- | block/blk-sysfs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index bb7c642ffefa..0619c8922893 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -402,7 +402,8 @@ static ssize_t queue_poll_store(struct request_queue *q, const char *page, unsigned long poll_on; ssize_t ret; - if (!q->tag_set || q->tag_set->nr_maps <= HCTX_TYPE_POLL) + if (!q->tag_set || q->tag_set->nr_maps <= HCTX_TYPE_POLL || + !q->tag_set->map[HCTX_TYPE_POLL].nr_queues) return -EINVAL; ret = queue_var_store(&poll_on, page, count); |