linux-kernel - [PATCH] irq-devres: fix failure path of devm_request

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Date:	Sat, 7 Apr 2007 14:59:41 +0900
From:	Tejun Heo <htejun@...il.com>
To:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	gregkh@...e.de
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] irq-devres: fix failure path of devm_request_irq()

devres should be deallocated with devres_free() not kfree().  This bug
corrupts slab on IRQ request failure.  Fix it.

Signed-off-by: Tejun Heo <htejun@...il.com>
---
Sorry about the bug, please apply before 2.6.21 release.  Thanks.

diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c
index 85a430d..d8ee241 100644
--- a/kernel/irq/devres.c
+++ b/kernel/irq/devres.c
@@ -54,7 +54,7 @@ int devm_request_irq(struct device *dev, unsigned int irq,
 
 	rc = request_irq(irq, handler, irqflags, devname, dev_id);
 	if (rc) {
-		kfree(dr);
+		devres_free(dr);
 		return rc;
 	}
 
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