media: saa7164: fix return value check in saa7164_initdev()

commit 89f4d45b2752df5d222b5f63919ce59e2d8afaf4 upstream.

In case of error, the function kthread_run() 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 <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/media/pci/saa7164/saa7164-core.c b/drivers/media/pci/saa7164/saa7164-core.c
index 7618fdae811e3b28264de314c43fe8c6996a8ae9..62141b8f1e1a19f47ebd3595a6b76492f891bf78 100644 (file)
--- a/drivers/media/pci/saa7164/saa7164-core.c
+++ b/drivers/media/pci/saa7164/saa7164-core.c
@@ -1348,9 +1348,11 @@ static int saa7164_initdev(struct pci_dev *pci_dev,
                if (fw_debug) {
                        dev->kthread = kthread_run(saa7164_thread_function, dev,
                                "saa7164 debug");
-                       if (!dev->kthread)
+                       if (IS_ERR(dev->kthread)) {
+                               dev->kthread = NULL;
                                printk(KERN_ERR "%s() Failed to create "
                                        "debug kernel thread\n", __func__);
+                       }
                }
 
        } /* != BOARD_UNKNOWN */