linux-kernel - [PATCH 20/21]: powerpc/cell spidernet release all descrs

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Date:	Tue, 10 Oct 2006 16:22:29 -0500
From:	linas@...tin.ibm.com (Linas Vepstas)
To:	akpm@...l.org
Cc:	jeff@...zik.org, Arnd Bergmann <arnd@...db.de>,
	netdev@...r.kernel.org, James K Lewis <jklewis@...ibm.com>,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: [PATCH 20/21]: powerpc/cell spidernet release all descrs


Bugfix: rx descriptor release function fails to visit
the last entry while walking receive descriptor ring.

Signed-off-by: Linas Vepstas <linas@...tin.ibm.com>
Cc: James K Lewis <jklewis@...ibm.com>
Cc: Arnd Bergmann <arnd@...db.de>

----
 drivers/net/spider_net.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Index: linux-2.6.18-mm2/drivers/net/spider_net.c
===================================================================
--- linux-2.6.18-mm2.orig/drivers/net/spider_net.c	2006-10-10 13:37:40.000000000 -0500
+++ linux-2.6.18-mm2/drivers/net/spider_net.c	2006-10-10 13:40:56.000000000 -0500
@@ -358,7 +358,7 @@ spider_net_free_rx_chain_contents(struct
 	struct spider_net_descr *descr;
 
 	descr = card->rx_chain.head;
-	while (descr->next != card->rx_chain.head) {
+	do {
 		if (descr->skb) {
 			dev_kfree_skb(descr->skb);
 			pci_unmap_single(card->pdev, descr->buf_addr,
@@ -366,7 +366,7 @@ spider_net_free_rx_chain_contents(struct
 					 PCI_DMA_BIDIRECTIONAL);
 		}
 		descr = descr->next;
-	}
+	} while (descr != card->rx_chain.head);
 }
 
 /**
-
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