summaryrefslogtreecommitdiff
path: root/block/blk-mq-tag.c
diff options
context:
space:
mode:
Diffstat (limited to 'block/blk-mq-tag.c')
-rw-r--r--block/blk-mq-tag.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c
index d0be72ccb091..dc9e6dac5a2a 100644
--- a/block/blk-mq-tag.c
+++ b/block/blk-mq-tag.c
@@ -214,7 +214,11 @@ static bool bt_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
bitnr += tags->nr_reserved_tags;
rq = tags->rqs[bitnr];
- if (rq->q == hctx->queue)
+ /*
+ * We can hit rq == NULL here, because the tagging functions
+ * test and set the bit before assining ->rqs[].
+ */
+ if (rq && rq->q == hctx->queue)
iter_data->fn(hctx, rq, iter_data->data, reserved);
return true;
}
@@ -248,9 +252,15 @@ static bool bt_tags_iter(struct sbitmap *bitmap, unsigned int bitnr, void *data)
if (!reserved)
bitnr += tags->nr_reserved_tags;
+
+ /*
+ * We can hit rq == NULL here, because the tagging functions
+ * test and set the bit before assining ->rqs[].
+ */
rq = tags->rqs[bitnr];
+ if (rq)
+ iter_data->fn(rq, iter_data->data, reserved);
- iter_data->fn(rq, iter_data->data, reserved);
return true;
}