From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anton Vorontsov Subject: [PATCH 1/3] [NET] uli526x: initialize the hardware prior to requesting interrupts Date: Tue, 29 Apr 2008 19:53:13 +0400 Message-ID: <20080429155313.GA28166@polina.dev.rtsoft.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=utf8 Cc: Kumar Gala , netdev@vger.kernel.org, linuxppc-dev@ozlabs.org To: Jeff Garzik Return-path: Received: from rtsoft2.corbina.net ([85.21.88.2]:49610 "HELO mail.dev.rtsoft.ru" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with SMTP id S1759349AbYD2PxT (ORCPT ); Tue, 29 Apr 2008 11:53:19 -0400 Content-Disposition: inline Sender: netdev-owner@vger.kernel.org List-ID: The firmware on MPC8610HPCD boards enables ULI ethernet and leaves it in some funky state before booting Linux. For drivers, it's always good idea to (re)initialize the hardware prior to requesting interrupts. This patch fixes the following oops: Oops: Kernel access of bad area, sig: 11 [#1] MPC86xx HPCD NIP: c0172820 LR: c017287c CTR: 00000000 [...] NIP [c0172820] allocate_rx_buffer+0x2c/0xb0 LR [c017287c] allocate_rx_buffer+0x88/0xb0 Call Trace: [df82bdc0] [c017287c] allocate_rx_buffer+0x88/0xb0 (unreliable) [df82bde0] [c0173000] uli526x_interrupt+0xe4/0x49c [df82be20] [c0045418] request_irq+0xf0/0x114 [df82be50] [c01737b0] uli526x_open+0x48/0x160 [df82be70] [c0201184] dev_open+0xb0/0xe8 [df82be80] [c0200104] dev_change_flags+0x90/0x1bc [df82bea0] [c035fab0] ip_auto_config+0x214/0xef4 [df82bf60] [c03421c8] kernel_init+0xc4/0x2ac [df82bff0] [c0010834] kernel_thread+0x44/0x60 Instruction dump: 4e800020 9421ffe0 7c0802a6 bfa10014 7c7e1b78 90010024 80030060 83e30054 2b80002f 419d0078 3fa0c039 48000058 <907f0010> 80630088 2f830000 419e0014 Signed-off-by: Anton Vorontsov --- drivers/net/tulip/uli526x.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/net/tulip/uli526x.c b/drivers/net/tulip/uli526x.c index a59c1f2..1f077ac 100644 --- a/drivers/net/tulip/uli526x.c +++ b/drivers/net/tulip/uli526x.c @@ -434,10 +434,6 @@ static int uli526x_open(struct net_device *dev) ULI526X_DBUG(0, "uli526x_open", 0); - ret = request_irq(dev->irq, &uli526x_interrupt, IRQF_SHARED, dev->name, dev); - if (ret) - return ret; - /* system variable init */ db->cr6_data = CR6_DEFAULT | uli526x_cr6_user_set; db->tx_packet_cnt = 0; @@ -456,6 +452,10 @@ static int uli526x_open(struct net_device *dev) /* Initialize ULI526X board */ uli526x_init(dev); + ret = request_irq(dev->irq, &uli526x_interrupt, IRQF_SHARED, dev->name, dev); + if (ret) + return ret; + /* Active System Interface */ netif_wake_queue(dev); -- 1.5.5.1