linux-kernel - [ 033/108] [media] dvb-core: Release semaphore on error path dvb_register

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Date:	Mon, 23 Jul 2012 02:07:24 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk,
	Santosh Nayak <santoshprasadnayak@...il.com>,
	Mauro Carvalho Chehab <mchehab@...hat.com>
Subject: [ 033/108] [media] dvb-core: Release semaphore on error path
 dvb_register_device()

3.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Santosh Nayak <santoshprasadnayak@...il.com>

commit 82163edcdfa4eb3d74516cc8e9f38dd3d039b67d upstream.

There is a missing "up_write()" here. Semaphore should be released
before returning error value.

Signed-off-by: Santosh Nayak <santoshprasadnayak@...il.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/media/dvb/dvb-core/dvbdev.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/dvb/dvb-core/dvbdev.c b/drivers/media/dvb/dvb-core/dvbdev.c
index 00a6732..39eab73 100644
--- a/drivers/media/dvb/dvb-core/dvbdev.c
+++ b/drivers/media/dvb/dvb-core/dvbdev.c
@@ -243,6 +243,7 @@ int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev,
 	if (minor == MAX_DVB_MINORS) {
 		kfree(dvbdevfops);
 		kfree(dvbdev);
+		up_write(&minor_rwsem);
 		mutex_unlock(&dvbdev_register_lock);
 		return -EINVAL;
 	}


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