linux-kernel - [PATCH] staging: media: lirc: lirc_zilog: Fix for possible null pointer dereference

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Message-Id: <1422557288-3617-1-git-send-email-rickard_strandqvist@spectrumdigital.se>
Date:	Thu, 29 Jan 2015 19:48:08 +0100
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Jarod Wilson <jarod@...sonet.com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Aya Mahfouz <mahfouz.saif.elyazal@...il.com>,
	Gulsah Kose <gulsah.1004@...il.com>,
	Tuomas Tynkkynen <tuomas.tynkkynen@....fi>,
	Martin Kaiser <martin@...ser.cx>, linux-media@...r.kernel.org,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH] staging: media: lirc: lirc_zilog: Fix for possible null pointer dereference

Fix a possible null pointer dereference, there is
otherwise a risk of a possible null pointer dereference.

This was found using a static code analysis program called cppcheck

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/staging/media/lirc/lirc_zilog.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/staging/media/lirc/lirc_zilog.c b/drivers/staging/media/lirc/lirc_zilog.c
index cc872fb..78ce3b0 100644
--- a/drivers/staging/media/lirc/lirc_zilog.c
+++ b/drivers/staging/media/lirc/lirc_zilog.c
@@ -1332,10 +1332,8 @@ static int close(struct inode *node, struct file *filep)
 	/* find our IR struct */
 	struct IR *ir = filep->private_data;
 
-	if (ir == NULL) {
-		dev_err(ir->l.dev, "close: no private_data attached to the file!\n");
+	if (ir == NULL)
 		return -ENODEV;
-	}
 
 	atomic_dec(&ir->open_count);
 
-- 
1.7.10.4

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