[PATCH] block: sed-opal: avoid possible wrong address reference in read_sed_opal_key()

[Su Hui]

Clang static checker (scan-build) warning:
block/sed-opal.c:line 317, column 3
Value stored to 'ret' is never read.

Fix this problem by returning the error code when keyring_search() failed.
Otherwise, 'key' will have a wrong value when 'kerf' stores the error code.

Fixes: 3bfeb6125664 ("block: sed-opal: keyring support for SED keys")
Signed-off-by: Su Hui <suhui@xxxxxxxxxxxx>
---
 block/sed-opal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/sed-opal.c b/block/sed-opal.c
index 14fe0fef811c..598fd3e7fcc8 100644
--- a/block/sed-opal.c
+++ b/block/sed-opal.c
@@ -314,7 +314,7 @@ static int read_sed_opal_key(const char *key_name, u_char *buffer, int buflen)
 			      &key_type_user, key_name, true);
 
 	if (IS_ERR(kref))
-		ret = PTR_ERR(kref);
+		return PTR_ERR(kref);
 
 	key = key_ref_to_ptr(kref);
 	down_read(&key->sem);
-- 
2.30.2