This patch creates efivars mount point when active efivars abstraction
be set. It is useful for userland to determine the availability of efivars
filesystem.
v2:
Using efivars_kobject() helper instead of checking GetVariable or
GetNextVariable EFI runtime services. Because the efivarfs code could be
instantiated using a different efivars abstraction.
Cc: Matthias Brugger <[email protected]>
Cc: Fabian Vogt <[email protected]>
Cc: Ilias Apalodimas <[email protected]>
Cc: Ard Biesheuvel <[email protected]>
Signed-off-by: "Lee, Chun-Yi" <[email protected]>
---
drivers/firmware/efi/efi.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 3aa07c3b5136..db483fc68501 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -405,11 +405,13 @@ static int __init efisubsys_init(void)
if (error)
goto err_remove_group;
- /* and the standard mountpoint for efivarfs */
- error = sysfs_create_mount_point(efi_kobj, "efivars");
- if (error) {
- pr_err("efivars: Subsystem registration failed.\n");
- goto err_remove_group;
+ if (efivars_kobject()) {
+ /* and the standard mountpoint for efivarfs */
+ error = sysfs_create_mount_point(efi_kobj, "efivars");
+ if (error) {
+ pr_err("efivars: Subsystem registration failed.\n");
+ goto err_remove_group;
+ }
}
if (efi_enabled(EFI_DBG) && efi_enabled(EFI_PRESERVE_BS_REGIONS))
--
2.16.4