[PATCH] platform/x86: thinkpad_acpi: initialize tp_nvram_state variable

[trix@redhat.com]

From: Tom Rix <trix@redhat.com>

clang static analysis flags this represenative problem
thinkpad_acpi.c:2523:7: warning: Branch condition evaluates
  to a garbage value
                if (!oldn->mute ||
                    ^~~~~~~~~~~

In hotkey_kthread() mute is conditionally set by hotkey_read_nvram()
but unconditionally checked by hotkey_compare_and_issue_event().
So the tp_nvram_state variable s[2] needs to be initialized.

Fixes: 01e88f25985d ("ACPI: thinkpad-acpi: add CMOS NVRAM polling for hot keys (v9)")
Signed-off-by: Tom Rix <trix@redhat.com>
---
 drivers/platform/x86/thinkpad_acpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 47925c319d7b..24da8b6872f2 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -2573,7 +2573,7 @@ static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn,
  */
 static int hotkey_kthread(void *data)
 {
-	struct tp_nvram_state s[2];
+	struct tp_nvram_state s[2] = { 0 };
 	u32 poll_mask, event_mask;
 	unsigned int si, so;
 	unsigned long t;
-- 
2.18.1