linux-kernel - [PATCH 3/3] ide: Fix cs5535 driver accessing beyond array boundary

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Date:	Thu, 18 Oct 2007 10:56:21 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
CC:	Linux IDE <linux-ide@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org>
Subject: [PATCH 3/3] ide: Fix cs5535 driver accessing beyond array boundary

The cs5535 use an incorrect construct to access the other drive
of a pair, causing it to access beyond an array boundary on non-0
interfaces. This fixes it by using the new ide_get_paired_drive()
hepler instead.

Signed-off-by: Benjamin Herrenschmidt <benh@...nel.crashing.org>
---

 drivers/ide/pci/cs5535.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-work/drivers/ide/pci/cs5535.c
===================================================================
--- linux-work.orig/drivers/ide/pci/cs5535.c	2007-10-18 10:43:39.000000000 +1000
+++ linux-work/drivers/ide/pci/cs5535.c	2007-10-18 10:44:00.000000000 +1000
@@ -84,7 +84,7 @@ static void cs5535_set_speed(ide_drive_t
 
 	/* Set the PIO timings */
 	if ((speed & XFER_MODE) == XFER_PIO) {
-		ide_drive_t *pair = &drive->hwif->drives[drive->dn ^ 1];
+		ide_drive_t *pair = ide_get_paired_drive(drive);
 		u8 cmd, pioa;
 
 		cmd = pioa = speed - XFER_PIO_0;
-
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