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[SCSI] gdth: bugfix for the at-exit problems

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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 <bharrosh@panasas.com>
Tested-by: Joerg Dorchain: <joerg@dorchain.net>
Tested-by: Stefan Priebe <s.priebe@allied-internet.ag>
Tested-by: Jon Chelton <jchelton@ffpglobal.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Boaz Harrosh 2008-02-27 15:27:16 -08:00 committed by James Bottomley
parent 31ed0bf439
commit b31ddd31c2
1 changed files with 28 additions and 54 deletions
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82
drivers/scsi/gdth.c
View file

@ -182,7 +182,6 @@ static int gdth_ioctl(struct inode *inode, struct file *filep,
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);
@ -417,12 +416,6 @@ static inline void gdth_set_sglist(struct scsi_cmnd *cmd,
#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;
@ -3794,6 +3787,8 @@ 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);
@ -4669,45 +4664,6 @@ 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)
{
@ -5142,13 +5098,13 @@ static void gdth_remove_one(gdth_ha_str *ha)
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);
@ -5174,6 +5130,24 @@ static void gdth_remove_one(gdth_ha_str *ha)
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) {
@ -5236,7 +5210,6 @@ 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;
@ -5246,14 +5219,15 @@ 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);