linux-kernel - [PATCH 1/6] ide: make "paranoia" ->handler check in ide

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Message-Id: <20081229190415.1020.43119.sendpatchset@localhost.localdomain>
Date:	Mon, 29 Dec 2008 20:04:15 +0100
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	linux-ide@...r.kernel.org
Cc:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/6] ide: make "paranoia" ->handler check in ide_intr() more strict

From: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
Subject: [PATCH] ide: make "paranoia" ->handler check in ide_intr() more strict

If ->handler is set while it shouldn't be it indicates deep problems
so BUG_ON()-ning and preventing further damage is much more appropriate
than merely printing an error message.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
---
trivia for pata-2.6 tree

 drivers/ide/ide-io.c |    9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

Index: b/drivers/ide/ide-io.c
===================================================================
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -1159,12 +1159,9 @@ irqreturn_t ide_intr (int irq, void *dev
 	 * won't allow another of the same (on any CPU) until we return.
 	 */
 	if (startstop == ide_stopped) {
-		if (hwif->handler == NULL) {	/* paranoia */
-			ide_unlock_port(hwif);
-			plug_device = 1;
-		} else
-			printk(KERN_ERR "%s: %s: huh? expected NULL handler "
-					"on exit\n", __func__, drive->name);
+		BUG_ON(hwif->handler);
+		ide_unlock_port(hwif);
+		plug_device = 1;
 	}
 out_handled:
 	irq_ret = IRQ_HANDLED;
--
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