linux-kernel - [8/9] driver core fixes: device_create

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Date:	Fri, 22 Sep 2006 11:37:27 +0200
From:	Cornelia Huck <cornelia.huck@...ibm.com>
To:	Greg K-H <greg@...ah.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: [8/9] driver core fixes: device_create_file() retval check in
 dmapool.c

From: Cornelia Huck <cornelia.huck@...ibm.com>

Check for device_create_file() return value in dma_pool_create().

Signed-off-by: Cornelia Huck <cornelia.huck@...ibm.com>

---
 drivers/base/dmapool.c |   13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

--- linux-2.6-CH.orig/drivers/base/dmapool.c
+++ linux-2.6-CH/drivers/base/dmapool.c
@@ -141,11 +141,20 @@ dma_pool_create (const char *name, struc
 	init_waitqueue_head (&retval->waitq);
 
 	if (dev) {
+		int ret;
+
 		down (&pools_lock);
 		if (list_empty (&dev->dma_pools))
-			device_create_file (dev, &dev_attr_pools);
+			ret = device_create_file (dev, &dev_attr_pools);
+		else
+			ret = 0;
 		/* note:  not currently insisting "name" be unique */
-		list_add (&retval->pools, &dev->dma_pools);
+		if (!ret)
+			list_add (&retval->pools, &dev->dma_pools);
+		else {
+			kfree(retval);
+			retval = NULL;
+		}
 		up (&pools_lock);
 	} else
 		INIT_LIST_HEAD (&retval->pools);
-
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