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path: root/drivers/scsi/gdth.c
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Diffstat (limited to 'drivers/scsi/gdth.c')
-rw-r--r--drivers/scsi/gdth.c51
1 files changed, 34 insertions, 17 deletions
diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index 8e2e964af66..46771d4c81b 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -550,7 +550,6 @@ static int __init gdth_search_isa(ulong32 bios_adr)
#endif /* CONFIG_ISA */
#ifdef CONFIG_PCI
-static bool gdth_pci_registered;
static bool gdth_search_vortex(ushort device)
{
@@ -3724,6 +3723,8 @@ static void gdth_log_event(gdth_evt_data *dvr, char *buffer)
}
#ifdef GDTH_STATISTICS
+static unchar gdth_timer_running;
+
static void gdth_timeout(ulong data)
{
ulong32 i;
@@ -3731,7 +3732,10 @@ static void gdth_timeout(ulong data)
gdth_ha_str *ha;
ulong flags;
- BUG_ON(list_empty(&gdth_instances));
+ if(unlikely(list_empty(&gdth_instances))) {
+ gdth_timer_running = 0;
+ return;
+ }
ha = list_first_entry(&gdth_instances, gdth_ha_str, list);
spin_lock_irqsave(&ha->smp_lock, flags);
@@ -3751,6 +3755,22 @@ static void gdth_timeout(ulong data)
add_timer(&gdth_timer);
spin_unlock_irqrestore(&ha->smp_lock, flags);
}
+
+static void gdth_timer_init(void)
+{
+ if (gdth_timer_running)
+ return;
+ gdth_timer_running = 1;
+ TRACE2(("gdth_detect(): Initializing timer !\n"));
+ gdth_timer.expires = jiffies + HZ;
+ gdth_timer.data = 0L;
+ gdth_timer.function = gdth_timeout;
+ add_timer(&gdth_timer);
+}
+#else
+static inline void gdth_timer_init(void)
+{
+}
#endif
static void __init internal_setup(char *str,int *ints)
@@ -4735,6 +4755,7 @@ static int __init gdth_isa_probe_one(ulong32 isa_bios)
if (error)
goto out_free_coal_stat;
list_add_tail(&ha->list, &gdth_instances);
+ gdth_timer_init();
scsi_scan_host(shp);
@@ -4865,6 +4886,7 @@ static int __init gdth_eisa_probe_one(ushort eisa_slot)
if (error)
goto out_free_coal_stat;
list_add_tail(&ha->list, &gdth_instances);
+ gdth_timer_init();
scsi_scan_host(shp);
@@ -5011,6 +5033,7 @@ static int gdth_pci_probe_one(gdth_pci_str *pcistr,
list_add_tail(&ha->list, &gdth_instances);
pci_set_drvdata(ha->pdev, ha);
+ gdth_timer_init();
scsi_scan_host(shp);
@@ -5110,6 +5133,7 @@ static int __init gdth_init(void)
/* initializations */
gdth_polling = TRUE;
gdth_clear_events();
+ init_timer(&gdth_timer);
/* As default we do not probe for EISA or ISA controllers */
if (probe_eisa_isa) {
@@ -5132,23 +5156,17 @@ static int __init gdth_init(void)
#ifdef CONFIG_PCI
/* scanning for PCI controllers */
- if (pci_register_driver(&gdth_pci_driver) == 0)
- gdth_pci_registered = true;
+ if (pci_register_driver(&gdth_pci_driver)) {
+ gdth_ha_str *ha;
+
+ list_for_each_entry(ha, &gdth_instances, list)
+ gdth_remove_one(ha);
+ return -ENODEV;
+ }
#endif /* CONFIG_PCI */
TRACE2(("gdth_detect() %d controller detected\n", gdth_ctr_count));
- if (list_empty(&gdth_instances))
- return -ENODEV;
-
-#ifdef GDTH_STATISTICS
- TRACE2(("gdth_detect(): Initializing timer !\n"));
- init_timer(&gdth_timer);
- gdth_timer.expires = jiffies + HZ;
- gdth_timer.data = 0L;
- gdth_timer.function = gdth_timeout;
- add_timer(&gdth_timer);
-#endif
major = register_chrdev(0,"gdth", &gdth_fops);
register_reboot_notifier(&gdth_notifier);
gdth_polling = FALSE;
@@ -5167,8 +5185,7 @@ static void __exit gdth_exit(void)
#endif
#ifdef CONFIG_PCI
- if (gdth_pci_registered)
- pci_unregister_driver(&gdth_pci_driver);
+ pci_unregister_driver(&gdth_pci_driver);
#endif
list_for_each_entry(ha, &gdth_instances, list)