fix a couple of more lazy "return -1"

Fix should strictly follow the rule to return negative errno-style
error codes from functions, hence let's fix more "return -1"-style
lazinesses.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/shared/efivars.c b/src/shared/efivars.c
index f18f5c4b16..a319574527 100644
--- a/src/shared/efivars.c
+++ b/src/shared/efivars.c
@@ -330,7 +330,7 @@ static int boot_id_hex(const char s[4]) {
                 else if (s[i] >= 'A' && s[i] <= 'F')
                         id |= (s[i] - 'A' + 10) << (3 - i) * 4;
                 else
-                        return -1;
+                        return -EINVAL;
 
         return id;
 }