Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755370AbZLSAVR (ORCPT ); Fri, 18 Dec 2009 19:21:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754840AbZLSAVQ (ORCPT ); Fri, 18 Dec 2009 19:21:16 -0500 Received: from mail.vyatta.com ([76.74.103.46]:53903 "EHLO mail.vyatta.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754715AbZLSAVO (ORCPT ); Fri, 18 Dec 2009 19:21:14 -0500 Date: Fri, 18 Dec 2009 16:20:54 -0800 From: Stephen Hemminger To: Bjorn Helgaas , "David S. Miller" Cc: Amit Kumar Salecha , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: NetXen crash in sysfs_create_file Message-ID: <20091218162054.7b19d98f@nehalam> In-Reply-To: <200912181324.29906.bjorn.helgaas@hp.com> References: <200912181324.29906.bjorn.helgaas@hp.com> Organization: Vyatta X-Mailer: Claws Mail 3.7.2 (GTK+ 2.18.3; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3449 Lines: 120 On Fri, 18 Dec 2009 13:24:28 -0700 Bjorn Helgaas wrote: > With CONFIG_NETXEN_NIC=y, I got the following crash. Turning off > NETXEN_NIC avoided it (this machine has no NetXen NIC). > > This is on bea4c899f2b5fad80099aea979780ef19f9b1987 (Linus upstream from > yesterday). > > Bjorn Subject: [PATCH] netxen: use module parameter correctly Netxen driver is doing this bogus thing to create a control file. This fails if device doesn't exist, and overall is a bad way to do the module parameter. Rather than fix borked code, just rewrite. Just using a writeable module parameter of 0/1 is the correct way Signed-off-by: Stephen Hemminger --- a/drivers/net/netxen/netxen_nic_main.c 2009-12-18 16:13:20.169390067 -0800 +++ b/drivers/net/netxen/netxen_nic_main.c 2009-12-18 16:17:43.650014965 -0800 @@ -57,7 +57,9 @@ static int use_msi = 1; static int use_msi_x = 1; -static unsigned long auto_fw_reset = AUTO_FW_RESET_ENABLED; +static int auto_fw_reset = AUTO_FW_RESET_ENABLED; +module_param(auto_fw_reset, int, 0644); +MODULE_PARM_DESC(auto_fw_reset,"Auto firmware reset (0=disabled, 1=enabled"); static int __devinit netxen_nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent); @@ -2534,42 +2536,6 @@ static struct bin_attribute bin_attr_mem .write = netxen_sysfs_write_mem, }; -#ifdef CONFIG_MODULES -static ssize_t -netxen_store_auto_fw_reset(struct module_attribute *mattr, - struct module *mod, const char *buf, size_t count) - -{ - unsigned long new; - - if (strict_strtoul(buf, 16, &new)) - return -EINVAL; - - if ((new == AUTO_FW_RESET_ENABLED) || (new == AUTO_FW_RESET_DISABLED)) { - auto_fw_reset = new; - return count; - } - - return -EINVAL; -} - -static ssize_t -netxen_show_auto_fw_reset(struct module_attribute *mattr, - struct module *mod, char *buf) - -{ - if (auto_fw_reset == AUTO_FW_RESET_ENABLED) - return sprintf(buf, "enabled\n"); - else - return sprintf(buf, "disabled\n"); -} - -static struct module_attribute mod_attr_fw_reset = { - .attr = {.name = "auto_fw_reset", .mode = (S_IRUGO | S_IWUSR)}, - .show = netxen_show_auto_fw_reset, - .store = netxen_store_auto_fw_reset, -}; -#endif static void netxen_create_sysfs_entries(struct netxen_adapter *adapter) @@ -2775,23 +2741,12 @@ static struct pci_driver netxen_driver = static int __init netxen_init_module(void) { -#ifdef CONFIG_MODULES - struct module *mod = THIS_MODULE; -#endif - printk(KERN_INFO "%s\n", netxen_nic_driver_string); #ifdef CONFIG_INET register_netdevice_notifier(&netxen_netdev_cb); register_inetaddr_notifier(&netxen_inetaddr_cb); #endif - -#ifdef CONFIG_MODULES - if (sysfs_create_file(&mod->mkobj.kobj, &mod_attr_fw_reset.attr)) - printk(KERN_ERR "%s: Failed to create auto_fw_reset " - "sysfs entry.", netxen_nic_driver_name); -#endif - return pci_register_driver(&netxen_driver); } @@ -2799,12 +2754,6 @@ module_init(netxen_init_module); static void __exit netxen_exit_module(void) { -#ifdef CONFIG_MODULES - struct module *mod = THIS_MODULE; - - sysfs_remove_file(&mod->mkobj.kobj, &mod_attr_fw_reset.attr); -#endif - pci_unregister_driver(&netxen_driver); #ifdef CONFIG_INET -- 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/