Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758407AbXHUGxD (ORCPT ); Tue, 21 Aug 2007 02:53:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758307AbXHUGw3 (ORCPT ); Tue, 21 Aug 2007 02:52:29 -0400 Received: from canuck.infradead.org ([209.217.80.40]:51475 "EHLO canuck.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758013AbXHUGw1 (ORCPT ); Tue, 21 Aug 2007 02:52:27 -0400 Date: Mon, 20 Aug 2007 23:53:53 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@kernel.org Cc: Justin Forbes , Zwane Mwaikambo , "Theodore Ts'o" , Randy Dunlap , Dave Jones , Chuck Wolber , Chris Wedgwood , Michael Krufky , Chuck Ebbert , Domenico Andreoli , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, netdev@vger.kernel.org, Stephen Hemminger , Greg Kroah-Hartman Subject: [patch 03/20] sky2: restore workarounds for lost interrupts Message-ID: <20070821065353.GD5275@kroah.com> References: <20070821064251.972690753@blue.kroah.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline; filename="sky2-lost-irq.patch" In-Reply-To: <20070821065210.GA5275@kroah.com> User-Agent: Mutt/1.5.15 (2007-04-06) X-Bad-Reply: References and In-Reply-To but no 'Re:' in Subject. Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1811 Lines: 52 -stable review patch. If anyone has any objections, please let us know. ------------------ From: Stephen Hemminger Backport of commit c59697e06058fc2361da8cefcfa3de85ac107582 This patch restores a couple of workarounds from 2.6.16: * restart transmit moderation timer in case it expires during IRQ routine * default to having 10 HZ watchdog timer. At this point it more important not to hang than to worry about the power cost. Signed-off-by: Stephen Hemminger Signed-off-by: Greg Kroah-Hartman --- drivers/net/sky2.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -96,7 +96,7 @@ static int disable_msi = 0; module_param(disable_msi, int, 0); MODULE_PARM_DESC(disable_msi, "Disable Message Signaled Interrupt (MSI)"); -static int idle_timeout = 0; +static int idle_timeout = 100; module_param(idle_timeout, int, 0); MODULE_PARM_DESC(idle_timeout, "Watchdog timer for lost interrupts (ms)"); @@ -2442,6 +2442,13 @@ static int sky2_poll(struct net_device * work_done = sky2_status_intr(hw, work_limit); if (work_done < work_limit) { + /* Bug/Errata workaround? + * Need to kick the TX irq moderation timer. + */ + if (sky2_read8(hw, STAT_TX_TIMER_CTRL) == TIM_START) { + sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_STOP); + sky2_write8(hw, STAT_TX_TIMER_CTRL, TIM_START); + } netif_rx_complete(dev0); /* end of interrupt, re-enables also acts as I/O synchronization */ -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/