linux-kernel - [patch] s390: tape class return value handling.

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Date:	Mon, 7 Aug 2006 17:05:16 +0200
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	linux-kernel@...r.kernel.org, heiko.carstens@...ibm.com
Subject: [patch] s390: tape class return value handling.

From: Heiko Carstens <heiko.carstens@...ibm.com>

[S390] tape class return value handling.

Without this patch register_tape_dev() will always fail, but might
return a value that is not an error number. This will lead to accesses
to already freed memory areas...

Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
---

 drivers/s390/char/tape_class.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)

diff -urpN linux-2.6/drivers/s390/char/tape_class.c linux-2.6-patched/drivers/s390/char/tape_class.c
--- linux-2.6/drivers/s390/char/tape_class.c	2006-08-07 14:14:29.000000000 +0200
+++ linux-2.6-patched/drivers/s390/char/tape_class.c	2006-08-07 14:14:42.000000000 +0200
@@ -76,7 +76,7 @@ struct tape_class_device *register_tape_
 				device,
 				"%s", tcd->device_name
 			);
-	rc = PTR_ERR(tcd->class_device);
+	rc = IS_ERR(tcd->class_device) ? PTR_ERR(tcd->class_device) : 0;
 	if (rc)
 		goto fail_with_cdev;
 	rc = sysfs_create_link(
-
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