netdev - [PATCH 3/8] gianfar: Don't needlessly set the wrap bit for the last RX BD

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Message-ID: <20091012160033.GC2463@oksana.dev.rtsoft.ru>
Date:	Mon, 12 Oct 2009 20:00:33 +0400
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	David Miller <davem@...emloft.net>
Cc:	Andy Fleming <afleming@...escale.com>,
	Dai Haruki <dai.haruki@...escale.com>,
	Scott Wood <scottwood@...escale.com>, linuxppc-dev@...abs.org,
	netdev@...r.kernel.org
Subject: [PATCH 3/8] gianfar: Don't needlessly set the wrap bit for the
 last RX BD

startup_gfar() sets the wrap bit for the last rxbd just after
gfar_new_rxbdp() call, which is issued for all rxbds. And
gfar_new_rxbdp() has the following check already:

	if (bdp == priv->rx_bd_base + priv->rx_ring_size - 1)
		lstatus |= BD_LFLAG(RXBD_WRAP);

So we don't need to set the bit again.

Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>
---
 drivers/net/gianfar.c |    4 ----
 1 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/drivers/net/gianfar.c b/drivers/net/gianfar.c
index b7881e6..ee23431 100644
--- a/drivers/net/gianfar.c
+++ b/drivers/net/gianfar.c
@@ -1028,10 +1028,6 @@ int startup_gfar(struct net_device *ndev)
 		rxbdp++;
 	}
 
-	/* Set the last descriptor in the ring to wrap */
-	rxbdp--;
-	rxbdp->status |= RXBD_WRAP;
-
 	/* If the device has multiple interrupts, register for
 	 * them.  Otherwise, only register for the one */
 	if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
-- 
1.6.3.3

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