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Diffstat (limited to 'block/blk-settings.c')
-rw-r--r--block/blk-settings.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/block/blk-settings.c b/block/blk-settings.c
index bb93d4c3277..8dd86418f35 100644
--- a/block/blk-settings.c
+++ b/block/blk-settings.c
@@ -286,8 +286,14 @@ void blk_queue_stack_limits(struct request_queue *t, struct request_queue *b)
t->max_hw_segments = min(t->max_hw_segments, b->max_hw_segments);
t->max_segment_size = min(t->max_segment_size, b->max_segment_size);
t->hardsect_size = max(t->hardsect_size, b->hardsect_size);
- if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags))
+ if (!t->queue_lock)
+ WARN_ON_ONCE(1);
+ else if (!test_bit(QUEUE_FLAG_CLUSTER, &b->queue_flags)) {
+ unsigned long flags;
+ spin_lock_irqsave(t->queue_lock, flags);
queue_flag_clear(QUEUE_FLAG_CLUSTER, t);
+ spin_unlock_irqrestore(t->queue_lock, flags);
+ }
}
EXPORT_SYMBOL(blk_queue_stack_limits);