efivars: if OsIndicationsSupported does not exist, assume that reboot-to-firmware...

It's not advertised and hence not available.

Fixes: #7424

diff --git a/src/shared/efivars.c b/src/shared/efivars.c
index cf2966fd5cb2b3685306ea6cb6c822dbbd60ef05..9ca51cf7507092070ad6065562879eadfd7e8ff9 100644 (file)
--- a/src/shared/efivars.c
+++ b/src/shared/efivars.c
@@ -119,6 +119,8 @@ int efi_reboot_to_firmware_supported(void) {
                 return -EOPNOTSUPP;
 
         r = efi_get_variable(EFI_VENDOR_GLOBAL, "OsIndicationsSupported", NULL, &v, &s);
+        if (r == -ENOENT) /* variable doesn't exist? it's not supported then */
+                return -EOPNOTSUPP;
         if (r < 0)
                 return r;
         if (s != sizeof(uint64_t))