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blk-mq: protect debugfs_create_files() from failures
[sfrench/cifs-2.6.git]
/
block
/
blk-mq-debugfs.c
diff --git
a/block/blk-mq-debugfs.c
b/block/blk-mq-debugfs.c
index 90d68760af086bd6de78c71dc4a1f6954ceb7a5b..777638f597aa66c6c54aa4d7915fec2eabb1167d 100644
(file)
--- a/
block/blk-mq-debugfs.c
+++ b/
block/blk-mq-debugfs.c
@@
-838,6
+838,9
@@
static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = {
static bool debugfs_create_files(struct dentry *parent, void *data,
const struct blk_mq_debugfs_attr *attr)
{
+ if (IS_ERR_OR_NULL(parent))
+ return false;
+
d_inode(parent)->i_private = data;
for (; attr->name; attr++) {