From mboxrd@z Thu Jan 1 00:00:00 1970 From: linas@austin.ibm.com (Linas Vepstas) Subject: [PATCH 8/10] spidernet: reset the card when an rxramfull is seen Date: Wed, 16 May 2007 17:19:46 -0500 Message-ID: <20070516221946.GH4997@austin.ibm.com> References: <20070516215605.GA4325@austin.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: cbe-oss-dev@ozlabs.org, netdev@vger.kernel.org To: Jeff Garzik Return-path: Received: from e34.co.us.ibm.com ([32.97.110.152]:56300 "EHLO e34.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755456AbXEPWTw (ORCPT ); Wed, 16 May 2007 18:19:52 -0400 Received: from d03relay02.boulder.ibm.com (d03relay02.boulder.ibm.com [9.17.195.227]) by e34.co.us.ibm.com (8.13.8/8.13.8) with ESMTP id l4GMJl1A024114 for ; Wed, 16 May 2007 18:19:47 -0400 Received: from d03av02.boulder.ibm.com (d03av02.boulder.ibm.com [9.17.195.168]) by d03relay02.boulder.ibm.com (8.13.8/8.13.8/NCO v8.3) with ESMTP id l4GMJlnB269930 for ; Wed, 16 May 2007 16:19:47 -0600 Received: from d03av02.boulder.ibm.com (loopback [127.0.0.1]) by d03av02.boulder.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id l4GMJkXm018741 for ; Wed, 16 May 2007 16:19:46 -0600 Content-Disposition: inline In-Reply-To: <20070516215605.GA4325@austin.ibm.com> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org Some versions of the spider have a firmware bug, where the RX ring sequencer goes crazy when the RX RAM on the device fills up. Appearently the only viable wrkaround is a soft reset of the card. Signed-off-by: Linas Vepstas ---- drivers/net/spider_net.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) Index: linux-2.6.22-rc1/drivers/net/spider_net.c =================================================================== --- linux-2.6.22-rc1.orig/drivers/net/spider_net.c 2007-05-15 14:48:06.000000000 -0500 +++ linux-2.6.22-rc1/drivers/net/spider_net.c 2007-05-15 16:34:46.000000000 -0500 @@ -1505,11 +1505,17 @@ spider_net_handle_error_irq(struct spide case SPIDER_NET_GRFBFLLINT: /* fallthrough */ case SPIDER_NET_GRFAFLLINT: /* fallthrough */ case SPIDER_NET_GRMFLLINT: - if (netif_msg_intr(card) && net_ratelimit()) - pr_err("%s: Spider RX RAM full, incoming packets " - "might be discarded!\n", card->netdev->name); + if (netif_msg_intr(card) && net_ratelimit()) { + pr_err("%s: Spider RX RAM full, reseting device.\n", + card->netdev->name); + show_rx_chain(card); + } spider_net_rx_irq_off(card); netif_rx_schedule(card->netdev); + + /* If the card is spewing rxramfulls, then reset */ + atomic_inc(&card->tx_timeout_task_counter); + schedule_work(&card->tx_timeout_task); show_error = 0; break; @@ -2086,6 +2092,8 @@ spider_net_workaround_rxramfull(struct s { int i, sequencer = 0; + printk(KERN_INFO "%s: calling rxramfull workaround\n", card->netdev->name); + /* cancel reset */ spider_net_write_reg(card, SPIDER_NET_CKRCTRL, SPIDER_NET_CKRCTRL_RUN_VALUE);