linux-kernel - [PATCH 10/28] V4L/DVB (4972): Dvb-core: fix bug in CRC-32 checking on 64-bit systems

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Message-id: <20061227165728.PS93298400010@infradead.org>
Date:	Wed, 27 Dec 2006 14:57:29 -0200
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	V4L-DVB Maintainers <v4l-dvb-maintainer@...uxtv.org>,
	Ang Way Chuang <wcang@....cs.usm.my>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>
Subject: [PATCH 10/28] V4L/DVB (4972): Dvb-core: fix bug in CRC-32 checking
	on 64-bit systems


From: Ang Way Chuang <wcang@....cs.usm.my>

CRC-32 checking during ULE decapsulation always failed on x86_64 systems due
to the size of a variable used to store CRC. This bug was discovered on
Fedora Core 6 with kernel-2.6.18-1.2849. The i386 counterpart has no such
problem. This patch has been tested on 64-bit system as well as 32-bit system.

Signed-off-by: Ang Way Chuang <wcang@....cs.usm.my>
Signed-off-by: Michael Krufky <mkrufky@...uxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...radead.org>
---

 drivers/media/dvb/dvb-core/dvb_net.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/media/dvb/dvb-core/dvb_net.c b/drivers/media/dvb/dvb-core/dvb_net.c
index ebf4dc5..8138b37 100644
--- a/drivers/media/dvb/dvb-core/dvb_net.c
+++ b/drivers/media/dvb/dvb-core/dvb_net.c
@@ -605,7 +605,7 @@ #endif
 				{ &utype, sizeof utype },
 				{ priv->ule_skb->data, priv->ule_skb->len - 4 }
 			};
-			unsigned long ule_crc = ~0L, expected_crc;
+			u32 ule_crc = ~0L, expected_crc;
 			if (priv->ule_dbit) {
 				/* Set D-bit for CRC32 verification,
 				 * if it was set originally. */

-
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