We shouldn't set "set->tags" to NULL here because if we return -ENOMEM
here then we call the function a second time. On the second time
through the loop then the statement:
set->tags[i] = blk_mq_init_rq_map(set, i);
will Oops. Also it is a memory leak and a layering violation. There is
a correct call to kfree(set->tags) in blk_mq_alloc_tag_set().
Fixes: a516440542af ('blk-mq: scale depth and rq map appropriate if low on
memory')
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 3d863df..7e7ca57 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1961,7 +1961,6 @@ out_unwind:
while (--i >= 0)
blk_mq_free_rq_map(set, set->tags[i], i);
- set->tags = NULL;
return -ENOMEM;
}
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