linux-kernel - [PATCH] synclink_gt fix locking in error path of rx enable

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Message-Id: <1216391246.17213.3.camel@x2.microgate.com>
Date:	Fri, 18 Jul 2008 09:27:26 -0500
From:	Paul Fulghum <paulkf@...rogate.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] synclink_gt fix locking in error path of rx enable

Fix locking in error path of rx_enable() introduced by
synclink_gt-add-rx-dma-buffer-fill-level-control patch.

Signed-off-by: Paul Fulghum <paulkf@...rogate.com>


--- a/drivers/char/synclink_gt.c	2008-07-18 09:14:41.000000000 -0500
+++ b/drivers/char/synclink_gt.c	2008-07-18 09:13:57.000000000 -0500
@@ -2700,8 +2700,10 @@ static int rx_enable(struct slgt_info *i
 	 */
 	rbuf_fill_level = ((unsigned int)enable) >> 16;
 	if (rbuf_fill_level) {
-		if ((rbuf_fill_level > DMABUFSIZE) || (rbuf_fill_level % 4))
+		if ((rbuf_fill_level > DMABUFSIZE) || (rbuf_fill_level % 4)) {
+			spin_unlock_irqrestore(&info->lock, flags);
 			return -EINVAL;
+		}
 		info->rbuf_fill_level = rbuf_fill_level;
 		rx_stop(info); /* restart receiver to use new fill level */
 	}


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