[PATCH 2/2] efi: library function grub_efi_close_protocol()

[Heinrich Schuchardt]

Create a library function for CloseProtocol() and use it for the SNP
driver.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
---
 grub-core/kern/efi/efi.c           | 18 ++++++++++++++++++
 grub-core/net/drivers/efi/efinet.c |  8 ++------
 include/grub/efi/efi.h             |  3 +++
 3 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 8cff7be02..1d331d858 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -117,6 +117,24 @@ grub_efi_open_protocol (grub_efi_handle_t handle,
   return interface;
 }
 
+grub_efi_status_t
+grub_efi_close_protocol (grub_efi_handle_t handle,
+                        grub_efi_guid_t *protocol)
+{
+  grub_efi_boot_services_t *b;
+  grub_efi_status_t status;
+
+
+  b = grub_efi_system_table->boot_services;
+  status = efi_call_4 (b->close_protocol,
+                      handle,
+                      protocol,
+                      grub_efi_image_handle,
+                      0);
+
+  return status;
+}
+
 int
 grub_efi_set_text_mode (int on)
 {
diff --git a/grub-core/net/drivers/efi/efinet.c 
b/grub-core/net/drivers/efi/efinet.c
index 3f2ff03f5..2febbf84a 100644
--- a/grub-core/net/drivers/efi/efinet.c
+++ b/grub-core/net/drivers/efi/efinet.c
@@ -155,9 +155,7 @@ open_card (struct grub_net_card *dev)
 
   if (dev->efi_net)
     {
-      efi_call_4 (grub_efi_system_table->boot_services->close_protocol,
-                 dev->efi_handle, &net_io_guid,
-                 grub_efi_image_handle, 0);
+      grub_efi_close_protocol (dev->efi_handle, &net_io_guid);
       dev->efi_net = NULL;
     }
   /*
@@ -223,9 +221,7 @@ close_card (struct grub_net_card *dev)
 {
   efi_call_1 (dev->efi_net->shutdown, dev->efi_net);
   efi_call_1 (dev->efi_net->stop, dev->efi_net);
-  efi_call_4 (grub_efi_system_table->boot_services->close_protocol,
-             dev->efi_handle, &net_io_guid,
-             grub_efi_image_handle, 0);
+  grub_efi_close_protocol (dev->efi_handle, &net_io_guid);
 }
 
 static struct grub_net_card_driver efidriver =
diff --git a/include/grub/efi/efi.h b/include/grub/efi/efi.h
index 83d958f99..12d041f2e 100644
--- a/include/grub/efi/efi.h
+++ b/include/grub/efi/efi.h
@@ -35,6 +35,9 @@ EXPORT_FUNC(grub_efi_locate_handle) 
(grub_efi_locate_search_type_t search_type,
 void *EXPORT_FUNC(grub_efi_open_protocol) (grub_efi_handle_t handle,
                                           grub_efi_guid_t *protocol,
                                           grub_efi_uint32_t attributes);
+grub_efi_status_t
+EXPORT_FUNC(grub_efi_close_protocol) (grub_efi_handle_t handle,
+                                     grub_efi_guid_t *protocol);
 int EXPORT_FUNC(grub_efi_set_text_mode) (int on);
 void EXPORT_FUNC(grub_efi_stall) (grub_efi_uintn_t microseconds);
 void *
-- 
2.32.0