From: Yue Hu <huyue2@xxxxxxxxxx>
If debugfs_create_dir() failed, the following debugfs_create_file()
will be meanless since it depends on non-NULL tmp dentry and it will
only waste CPU resource.
Signed-off-by: Yue Hu <huyue2@xxxxxxxxxx>
---
mm/cma_debug.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index 2c2c869..3e9d984 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -169,6 +169,8 @@ static void cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)
scnprintf(name, sizeof(name), "cma-%s", cma->name);
tmp = debugfs_create_dir(name, root_dentry);
+ if (!tmp)
+ return;
debugfs_create_file("alloc", 0200, tmp, cma, &cma_alloc_fops);
debugfs_create_file("free", 0200, tmp, cma, &cma_free_fops);
--
1.9.1
