netdev - [PATCH net] gianfar: fix babbling rx error event bug

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Date:	Wed, 27 May 2009 09:52:36 +0800
From:	Xiaotian Feng <Xiaotian.Feng@...driver.com>
To:	galak@...nel.crashing.org, davem@...emloft.net,
	netdev@...r.kernel.org
Cc:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org
Subject: [PATCH net] gianfar: fix babbling rx error event bug

Gianfar interrupt handler uses IEVENT_ERR_MASK to check and handle errors.
Babbling RX error (IEVENT_BABR) should be included in IEVENT_ERROR_MASK.
Otherwise if BABR is raised, it never gets handled nor cleared, and an
interrupt storm results. This has been observed to happen on sending a
burst of ethernet frames to a gianfar based board.

Signed-off-by: Xiaotian Feng <xiaotian.feng@...driver.com>
---
 drivers/net/gianfar.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index 0642d52..cf35296 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -259,7 +259,7 @@ extern const char gfar_driver_version[];
 (IEVENT_RXC | IEVENT_BSY | IEVENT_EBERR | IEVENT_MSRO | \
  IEVENT_BABT | IEVENT_TXC | IEVENT_TXE | IEVENT_LC \
  | IEVENT_CRL | IEVENT_XFUN | IEVENT_DPE | IEVENT_PERR \
- | IEVENT_MAG)
+ | IEVENT_MAG | IEVENT_BABR)
 
 #define IMASK_INIT_CLEAR	0x00000000
 #define IMASK_BABR              0x80000000
-- 
1.5.5.1

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