efi_loader: clear OsIndications

After each reboot we must clear flag
EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED in variable
OsIndications.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

diff --git a/lib/efi_loader/efi_setup.c b/lib/efi_loader/efi_setup.c
index 2dc6ba8..a2338d7 100644 (file)
--- a/lib/efi_loader/efi_setup.c
+++ b/lib/efi_loader/efi_setup.c
@@ -5,9 +5,12 @@
  *  Copyright (c) 2016-2018 Alexander Graf et al.
  */
 
+#define LOG_CATEGORY LOGC_EFI
+
 #include <common.h>
 #include <efi_loader.h>
 #include <efi_variable.h>
+#include <log.h>
 
 #define OBJ_LIST_NOT_INITIALIZED 1
 
@@ -171,6 +174,37 @@ static efi_status_t efi_init_os_indications(void)
                                    &os_indications_supported, false);
 }
 
+
+/**
+ * efi_clear_os_indications() - clear OsIndications
+ *
+ * Clear EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED
+ */
+static efi_status_t efi_clear_os_indications(void)
+{
+       efi_uintn_t size;
+       u64 os_indications;
+       efi_status_t ret;
+
+       size = sizeof(os_indications);
+       ret = efi_get_variable_int(L"OsIndications", &efi_global_variable_guid,
+                                  NULL, &size, &os_indications, NULL);
+       if (ret != EFI_SUCCESS)
+               os_indications = 0;
+       else
+               os_indications &=
+                       ~EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED;
+       ret = efi_set_variable_int(L"OsIndications", &efi_global_variable_guid,
+                                  EFI_VARIABLE_NON_VOLATILE |
+                                  EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                                  EFI_VARIABLE_RUNTIME_ACCESS,
+                                  sizeof(os_indications), &os_indications,
+                                  false);
+       if (ret != EFI_SUCCESS)
+               log_err("Setting %ls failed\n", L"OsIndications");
+       return ret;
+}
+
 /**
  * efi_init_obj_list() - Initialize and populate EFI object list
  *
@@ -178,7 +212,7 @@ static efi_status_t efi_init_os_indications(void)
  */
 efi_status_t efi_init_obj_list(void)
 {
-       efi_status_t ret = EFI_SUCCESS;
+       efi_status_t r, ret = EFI_SUCCESS;
 
        /* Initialize once only */
        if (efi_obj_list_initialized != OBJ_LIST_NOT_INITIALIZED)
@@ -297,7 +331,11 @@ efi_status_t efi_init_obj_list(void)
        if (IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK) &&
            !IS_ENABLED(CONFIG_EFI_CAPSULE_ON_DISK_EARLY))
                ret = efi_launch_capsules();
+
 out:
+       r = efi_clear_os_indications();
+       if (ret == EFI_SUCCESS)
+               ret = r;
        efi_obj_list_initialized = ret;
        return ret;
 }