linux-kernel - [PATCH] drivers cris: return on NULL dev_alloc

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Date:	Mon, 30 Oct 2006 17:01:07 -0800 (PST)
From:	David Rientjes <rientjes@...washington.edu>
To:	starvik@...s.com, dev-etrax@...s.com
cc:	linux-kernel@...r.kernel.org
Subject: [PATCH] drivers cris: return on NULL dev_alloc_skb()

If the next descriptor array entry cannot be allocated by dev_alloc_skb(),
return immediately so it is not dereferenced later.  We cannot register 
the device with a partial descriptor list.

Cc: Mikael Starvik <starvik@...s.com>
Signed-off-by: David Rientjes <rientjes@...washington.edu>
---
 drivers/net/cris/eth_v10.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/net/cris/eth_v10.c b/drivers/net/cris/eth_v10.c
index 966b563..a03d781 100644
--- a/drivers/net/cris/eth_v10.c
+++ b/drivers/net/cris/eth_v10.c
@@ -509,6 +509,8 @@ etrax_ethernet_init(void)
 		 * does not share cacheline with any other data (to avoid cache bug)
 		 */
 		RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
+		if (!RxDescList[i].skb)
+			return -ENOMEM;
 		RxDescList[i].descr.ctrl   = 0;
 		RxDescList[i].descr.sw_len = MAX_MEDIA_DATA_SIZE;
 		RxDescList[i].descr.next   = virt_to_phys(&RxDescList[i + 1]);
-
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