Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764238AbYCUXIZ (ORCPT ); Fri, 21 Mar 2008 19:08:25 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932128AbYCUWwD (ORCPT ); Fri, 21 Mar 2008 18:52:03 -0400 Received: from 216-99-217-87.dsl.aracnet.com ([216.99.217.87]:41274 "EHLO sous-sol.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932122AbYCUWwA (ORCPT ); Fri, 21 Mar 2008 18:52:00 -0400 Message-Id: <20080321224439.410973428@sous-sol.org> References: <20080321224250.144333319@sous-sol.org> User-Agent: quilt/0.46-1 Date: Fri, 21 Mar 2008 15:43:50 -0700 From: Chris Wright To: linux-kernel@vger.kernel.org, stable@kernel.org, jejb@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, Boaz Harrosh , James Bottomley , Greg Kroah-Hartman Subject: [patch 60/76] SCSI: gdth: bugfix for the at-exit problems Content-Disposition: inline; filename=scsi-gdth-bugfix-for-the-at-exit-problems.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5118 Lines: 179 -stable review patch. If anyone has any objections, please let us know. --------------------- From: Boaz Harrosh gdth_exit would first remove all cards then stop the timer and would not sync with the timer function. This caused a crash in gdth_timer() when module was unloaded. So del_timer_sync the timer before we delete the cards. also the reboot notifier function would crash. So clean that up and fix the crashes. Signed-off-by: Boaz Harrosh Tested-by: Joerg Dorchain: Tested-by: Stefan Priebe Tested-by: Jon Chelton Signed-off-by: James Bottomley Signed-off-by: Chris Wright Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/gdth.c | 82 +++++++++++++++++----------------------------------- 1 file changed, 28 insertions(+), 54 deletions(-) --- a/drivers/scsi/gdth.c +++ b/drivers/scsi/gdth.c @@ -183,7 +183,6 @@ static int gdth_ioctl(struct inode *inod unsigned int cmd, unsigned long arg); static void gdth_flush(gdth_ha_str *ha); -static int gdth_halt(struct notifier_block *nb, ulong event, void *buf); static int gdth_queuecommand(Scsi_Cmnd *scp,void (*done)(Scsi_Cmnd *)); static int __gdth_queuecommand(gdth_ha_str *ha, struct scsi_cmnd *scp, struct gdth_cmndinfo *cmndinfo); @@ -418,12 +417,6 @@ static inline void gdth_set_sglist(struc #include "gdth_proc.h" #include "gdth_proc.c" -/* notifier block to get a notify on system shutdown/halt/reboot */ -static struct notifier_block gdth_notifier = { - gdth_halt, NULL, 0 -}; -static int notifier_disabled = 0; - static gdth_ha_str *gdth_find_ha(int hanum) { gdth_ha_str *ha; @@ -3793,6 +3786,8 @@ static void gdth_timeout(ulong data) gdth_ha_str *ha; ulong flags; + BUG_ON(list_empty(&gdth_instances)); + ha = list_first_entry(&gdth_instances, gdth_ha_str, list); spin_lock_irqsave(&ha->smp_lock, flags); @@ -4668,45 +4663,6 @@ static void gdth_flush(gdth_ha_str *ha) } } -/* shutdown routine */ -static int gdth_halt(struct notifier_block *nb, ulong event, void *buf) -{ - gdth_ha_str *ha; -#ifndef __alpha__ - gdth_cmd_str gdtcmd; - char cmnd[MAX_COMMAND_SIZE]; -#endif - - if (notifier_disabled) - return NOTIFY_OK; - - TRACE2(("gdth_halt() event %d\n",(int)event)); - if (event != SYS_RESTART && event != SYS_HALT && event != SYS_POWER_OFF) - return NOTIFY_DONE; - - notifier_disabled = 1; - printk("GDT-HA: Flushing all host drives .. "); - list_for_each_entry(ha, &gdth_instances, list) { - gdth_flush(ha); - -#ifndef __alpha__ - /* controller reset */ - memset(cmnd, 0xff, MAX_COMMAND_SIZE); - gdtcmd.BoardNode = LOCALBOARD; - gdtcmd.Service = CACHESERVICE; - gdtcmd.OpCode = GDT_RESET; - TRACE2(("gdth_halt(): reset controller %d\n", ha->hanum)); - gdth_execute(ha->shost, &gdtcmd, cmnd, 10, NULL); -#endif - } - printk("Done.\n"); - -#ifdef GDTH_STATISTICS - del_timer(&gdth_timer); -#endif - return NOTIFY_OK; -} - /* configure lun */ static int gdth_slave_configure(struct scsi_device *sdev) { @@ -5141,13 +5097,13 @@ static void gdth_remove_one(gdth_ha_str scsi_remove_host(shp); + gdth_flush(ha); + if (ha->sdev) { scsi_free_host_dev(ha->sdev); ha->sdev = NULL; } - gdth_flush(ha); - if (shp->irq) free_irq(shp->irq,ha); @@ -5173,6 +5129,24 @@ static void gdth_remove_one(gdth_ha_str scsi_host_put(shp); } +static int gdth_halt(struct notifier_block *nb, ulong event, void *buf) +{ + gdth_ha_str *ha; + + TRACE2(("gdth_halt() event %d\n", (int)event)); + if (event != SYS_RESTART && event != SYS_HALT && event != SYS_POWER_OFF) + return NOTIFY_DONE; + + list_for_each_entry(ha, &gdth_instances, list) + gdth_flush(ha); + + return NOTIFY_OK; +} + +static struct notifier_block gdth_notifier = { + gdth_halt, NULL, 0 +}; + static int __init gdth_init(void) { if (disable) { @@ -5235,7 +5209,6 @@ static int __init gdth_init(void) add_timer(&gdth_timer); #endif major = register_chrdev(0,"gdth", &gdth_fops); - notifier_disabled = 0; register_reboot_notifier(&gdth_notifier); gdth_polling = FALSE; return 0; @@ -5245,14 +5218,15 @@ static void __exit gdth_exit(void) { gdth_ha_str *ha; - list_for_each_entry(ha, &gdth_instances, list) - gdth_remove_one(ha); + unregister_chrdev(major, "gdth"); + unregister_reboot_notifier(&gdth_notifier); #ifdef GDTH_STATISTICS - del_timer(&gdth_timer); + del_timer_sync(&gdth_timer); #endif - unregister_chrdev(major,"gdth"); - unregister_reboot_notifier(&gdth_notifier); + + list_for_each_entry(ha, &gdth_instances, list) + gdth_remove_one(ha); } module_init(gdth_init); -- -- 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/