efi/efi_test: Fix uninitialized variable 'datasize'

Fix minor issue found by CoverityScan:

  CID 1358931 (#1 of 1): Uninitialized scalar variable (UNINIT)9.
  uninit_use: Using uninitialized value datasize.
  199        prev_datasize = datasize;
  200        status = efi.get_variable(name, vd, at, dz, data);

Signed-off-by: Ivan Hu <ivan.hu@canonical.com>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20161018143318.15673-5-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/drivers/firmware/efi/test/efi_test.c b/drivers/firmware/efi/test/efi_test.c
index ae51268737ccf6b7a66621669a7c3107666a9d26..348efc9cf59f240f96ad6c1c6230b5a61f9e46b8 100644 (file)
--- a/drivers/firmware/efi/test/efi_test.c
+++ b/drivers/firmware/efi/test/efi_test.c
@@ -155,7 +155,7 @@ static long efi_runtime_get_variable(unsigned long arg)
 {
        struct efi_getvariable __user *getvariable_user;
        struct efi_getvariable getvariable;
-       unsigned long datasize, prev_datasize, *dz;
+       unsigned long datasize = 0, prev_datasize, *dz;
        efi_guid_t vendor_guid, *vd = NULL;
        efi_status_t status;
        efi_char16_t *name = NULL;