linux-kernel - [PATCH -next] staging: bcm2708_vchiq: fix return value check in vchiq_platform_conn_state

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Date:   Mon, 17 Oct 2016 15:06:07 +0000
From:   Wei Yongjun <weiyj.lk@...il.com>
To:     gregkh@...uxfoundation.org, daniels@...labora.com,
        noralf@...nnes.org, popcornmix@...il.com, bobby.prani@...il.com
Cc:     Wei Yongjun <weiyongjun1@...wei.com>, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH -next] staging: bcm2708_vchiq: fix return value check in vchiq_platform_conn_state_changed()

From: Wei Yongjun <weiyongjun1@...wei.com>

In case of error, the function kthread_create() returns ERR_PTR() and
never returns NULL. The NULL test in the return value check should be
replaced with IS_ERR().

Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
---
 drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
index e11c0e0..ccd1735 100644
--- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
+++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
@@ -2781,7 +2781,7 @@ void vchiq_platform_conn_state_changed(VCHIQ_STATE_T *state,
 				&vchiq_keepalive_thread_func,
 				(void *)state,
 				threadname);
-			if (arm_state->ka_thread == NULL) {
+			if (IS_ERR(arm_state->ka_thread)) {
 				vchiq_log_error(vchiq_susp_log_level,
 					"vchiq: FATAL: couldn't create thread %s",
 					threadname);