Fixes an uninitialized variable in OP-TEE driver

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Merge tag 'optee-async-notif-fix-for-v6.3' of https://git.linaro.org/people/jens.wiklander/linux-tee into arm/fixes

Fixes an uninitialized variable in OP-TEE driver

* tag 'optee-async-notif-fix-for-v6.3' of https://git.linaro.org/people/jens.wiklander/linux-tee:
  optee: fix uninited async notif value

Link: https://lore.kernel.org/r/20230421075443.GA3136581@rayden
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/tee/optee/smc_abi.c

@@ -1004,8 +1004,10 @@ static u32 get_async_notif_value(optee_invoke_fn *invoke_fn, bool *value_valid,
 
 	invoke_fn(OPTEE_SMC_GET_ASYNC_NOTIF_VALUE, 0, 0, 0, 0, 0, 0, 0, &res);
 
-	if (res.a0)
+	if (res.a0) {
+		*value_valid = false;
 		return 0;
+	}
 	*value_valid = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_VALID);
 	*value_pending = (res.a2 & OPTEE_SMC_ASYNC_NOTIF_VALUE_PENDING);
 	return res.a1;