From: Linas Vepstas <linas@austin.ibm.com>
Date: Tue, 10 Oct 2006 21:15:29 +0000 (-0500)
Subject: [PATCH] powerpc/cell spidernet
X-Git-Tag: v2.6.19-rc2~23^2~11
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=499eea18722e43f0ee15e11ac16ffcbd10b70b24;hp=9cc7bf7edf50a8a6b456b337aff97fe780ae369b;p=linux-2.6

[PATCH] powerpc/cell spidernet

Remove a dummy register read that is not needed.
This reduces CPU usage notably during transmit.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: James K Lewis <jklewis@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
---

diff --git a/drivers/net/spider_net.c b/drivers/net/spider_net.c
index f8d7d0d91a..6bb8f1f943 100644
--- a/drivers/net/spider_net.c
+++ b/drivers/net/spider_net.c
@@ -759,8 +759,6 @@ spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
 	unsigned long flags;
 	int status;
 
-	spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR);
-
 	while (chain->tail != chain->head) {
 		spin_lock_irqsave(&chain->lock, flags);
 		descr = chain->tail;