efi-pstore: implement efivars_pstore_exit()
The original efivars_pstore_exit() is empty. I
1) add a bufsize check statement.
2) call pstore_unregister as it is defined now.
3) free the memory and set bufsize to 0.
Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Kees Cook <keescook@chromium.org>
diff --git a/drivers/firmware/efi/efi-pstore.c b/drivers/firmware/efi/efi-pstore.c
index d5903ea..30a24d0 100644
--- a/drivers/firmware/efi/efi-pstore.c
+++ b/drivers/firmware/efi/efi-pstore.c
@@ -399,6 +399,13 @@
static __exit void efivars_pstore_exit(void)
{
+ if (!efi_pstore_info.bufsize)
+ return;
+
+ pstore_unregister(&efi_pstore_info);
+ kfree(efi_pstore_info.buf);
+ efi_pstore_info.buf = NULL;
+ efi_pstore_info.bufsize = 0;
}
module_init(efivars_pstore_init);