linux-kernel - [PATCH] Conexant 2388x: check for kthread

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Date:	Wed, 18 Jul 2007 22:56:24 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Mauro Carvalho Chehab <v4l-dvb-maintainer@...uxtv.org>
Subject: [PATCH] Conexant 2388x: check for kthread_run

This patch adds checking of kthread_run return code.

Signed-off-by: Cyrill Gorcunov <gorcunov@...il.com>
---
Probably we could just ignore a such situation (we do
check for core->kthread value before trying to stop the
thread) but we have to leave a footmark in kernel
messages anyway I guess. Comments?

 drivers/media/video/cx88/cx88-video.c |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/media/video/cx88/cx88-video.c b/drivers/media/video/cx88/cx88-video.c
index 98fa354..2e05450 100644
--- a/drivers/media/video/cx88/cx88-video.c
+++ b/drivers/media/video/cx88/cx88-video.c
@@ -1881,8 +1881,15 @@ static int __devinit cx8800_initdev(struct pci_dev *pci_dev,
 	mutex_unlock(&core->lock);
 
 	/* start tvaudio thread */
-	if (core->tuner_type != TUNER_ABSENT)
+	if (core->tuner_type != TUNER_ABSENT) {
 		core->kthread = kthread_run(cx88_audio_thread, core, "cx88 tvaudio");
+		if (IS_ERR(core->kthread)) {
+			err = PTR_ERR(core->kthread);
+			printk(KERN_ERR "Failed to create cx88 audio thread, err=%d\n",
+			       err);
+			goto fail_unreg;
+		}
+	}
 	return 0;
 
 fail_unreg:
-
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