efi: Move efi_status_to_err() to drivers/firmware/efi/

Move efi_status_to_err() to the architecture independent code as it's
generally useful in all bits of EFI code where there is a need to
convert an efi_status_t to a kernel error value.

Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Kweh Hock Leong <hock.leong.kweh@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: joeyli <jlee@suse.com>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/1461614832-17633-27-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2 files changed, 33 insertions, 33 deletions

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index 4991371012b4..05509f3aaee8 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -636,3 +636,36 @@ u64 __weak efi_mem_attributes(unsigned long phys_addr)
         }
         return 0;
 }
+
+int efi_status_to_err(efi_status_t status)
+{
+        int err;
+
+        switch (status) {
+        case EFI_SUCCESS:
+                err = 0;
+                break;
+        case EFI_INVALID_PARAMETER:
+                err = -EINVAL;
+                break;
+        case EFI_OUT_OF_RESOURCES:
+                err = -ENOSPC;
+                break;
+        case EFI_DEVICE_ERROR:
+                err = -EIO;
+                break;
+        case EFI_WRITE_PROTECTED:
+                err = -EROFS;
+                break;
+        case EFI_SECURITY_VIOLATION:
+                err = -EACCES;
+                break;
+        case EFI_NOT_FOUND:
+                err = -ENOENT;
+                break;
+        default:
+                err = -EINVAL;
+        }
+
+        return err;
+}
diff --git a/drivers/firmware/efi/vars.c b/drivers/firmware/efi/vars.c
index 34b741940494..0012331d5a3d 100644
--- a/drivers/firmware/efi/vars.c
+++ b/drivers/firmware/efi/vars.c
@@ -329,39 +329,6 @@ check_var_size_nonblocking(u32 attributes, unsigned long size)
         return fops->query_variable_store(attributes, size, true);
 }
 
-static int efi_status_to_err(efi_status_t status)
-{
-        int err;
-
-        switch (status) {
-        case EFI_SUCCESS:
-                err = 0;
-                break;
-        case EFI_INVALID_PARAMETER:
-                err = -EINVAL;
-                break;
-        case EFI_OUT_OF_RESOURCES:
-                err = -ENOSPC;
-                break;
-        case EFI_DEVICE_ERROR:
-                err = -EIO;
-                break;
-        case EFI_WRITE_PROTECTED:
-                err = -EROFS;
-                break;
-        case EFI_SECURITY_VIOLATION:
-                err = -EACCES;
-                break;
-        case EFI_NOT_FOUND:
-                err = -ENOENT;
-                break;
-        default:
-                err = -EINVAL;
-        }
-
-        return err;
-}
-
 static bool variable_is_present(efi_char16_t *variable_name, efi_guid_t *vendor,
                                 struct list_head *head)
 {