66 void scsi_eh_wakeup(struct Scsi_Host *shost)  in scsi_eh_wakeup()  argument
68 	lockdep_assert_held(shost->host_lock);  in scsi_eh_wakeup()
70 	if (scsi_host_busy(shost) == shost->host_failed) {  in scsi_eh_wakeup()
71 		trace_scsi_eh_wakeup(shost);  in scsi_eh_wakeup()
72 		wake_up_process(shost->ehandler);  in scsi_eh_wakeup()
73 		SCSI_LOG_ERROR_RECOVERY(5, shost_printk(KERN_INFO, shost,  in scsi_eh_wakeup()
84 void scsi_schedule_eh(struct Scsi_Host *shost)  in scsi_schedule_eh()  argument
88 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_schedule_eh()
90 	if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 ||  in scsi_schedule_eh()
91 	    scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) {  in scsi_schedule_eh()
92 		shost->host_eh_scheduled++;  in scsi_schedule_eh()
93 		scsi_eh_wakeup(shost);  in scsi_schedule_eh()
96 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_schedule_eh()
100 static int scsi_host_eh_past_deadline(struct Scsi_Host *shost)  in scsi_host_eh_past_deadline()  argument
102 	if (!shost->last_reset || shost->eh_deadline == -1)  in scsi_host_eh_past_deadline()
112 	if (time_before(jiffies, shost->last_reset + shost->eh_deadline) &&  in scsi_host_eh_past_deadline()
113 	    shost->eh_deadline > -1)  in scsi_host_eh_past_deadline()
197 	struct Scsi_Host *shost = sdev->host;  in scsi_abort_command()  local
211 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_abort_command()
212 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_abort_command()
213 		shost->last_reset = jiffies;  in scsi_abort_command()
214 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_abort_command()
219 	queue_delayed_work(shost->tmf_work_q, &scmd->abort_work, HZ / 100);  in scsi_abort_command()
243 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_inc_host_failed()  local
246 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
247 	shost->host_failed++;  in scsi_eh_inc_host_failed()
248 	scsi_eh_wakeup(shost);  in scsi_eh_inc_host_failed()
249 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
258 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_scmd_add()  local
262 	WARN_ON_ONCE(!shost->ehandler);  in scsi_eh_scmd_add()
264 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_scmd_add()
265 	if (scsi_host_set_state(shost, SHOST_RECOVERY)) {  in scsi_eh_scmd_add()
266 		ret = scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY);  in scsi_eh_scmd_add()
269 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_eh_scmd_add()
270 		shost->last_reset = jiffies;  in scsi_eh_scmd_add()
273 	list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);  in scsi_eh_scmd_add()
274 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_scmd_add()
360 static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,  in scsi_eh_prt_fail_stats()  argument
370 	shost_for_each_device(sdev, shost) {  in scsi_eh_prt_fail_stats()
383 				shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
393 	SCSI_LOG_ERROR_RECOVERY(2, shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
1067 	struct Scsi_Host *shost = sdev->host;  in scsi_send_eh_cmnd()  local
1076 	shost->eh_action = &done;  in scsi_send_eh_cmnd()
1098 		rtn = shost->hostt->queuecommand(shost, scmd);  in scsi_send_eh_cmnd()
1118 	shost->eh_action = NULL;  in scsi_send_eh_cmnd()
1228 	struct Scsi_Host *shost;  in scsi_eh_get_sense()  local
1240 		shost = scmd->device->host;  in scsi_eh_get_sense()
1241 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_get_sense()
1417 static int scsi_eh_stu(struct Scsi_Host *shost,  in scsi_eh_stu()  argument
1424 	shost_for_each_device(sdev, shost) {  in scsi_eh_stu()
1425 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_stu()
1483 static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,  in scsi_eh_bus_device_reset()  argument
1491 	shost_for_each_device(sdev, shost) {  in scsi_eh_bus_device_reset()
1492 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_device_reset()
1545 static int scsi_eh_target_reset(struct Scsi_Host *shost,  in scsi_eh_target_reset()  argument
1559 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_target_reset()
1564 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1574 			shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1580 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1607 static int scsi_eh_bus_reset(struct Scsi_Host *shost,  in scsi_eh_bus_reset()  argument
1623 	for (channel = 0; channel <= shost->max_channel; channel++) {  in scsi_eh_bus_reset()
1624 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_reset()
1627 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1648 			shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1665 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1679 static int scsi_eh_host_reset(struct Scsi_Host *shost,  in scsi_eh_host_reset()  argument
1692 			shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
1705 				shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
2021 static void scsi_restart_operations(struct Scsi_Host *shost)  in scsi_restart_operations()  argument
2031 	shost_for_each_device(sdev, shost) {  in scsi_restart_operations()
2044 		shost_printk(KERN_INFO, shost, "waking up host to restart\n"));  in scsi_restart_operations()
2046 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2047 	if (scsi_host_set_state(shost, SHOST_RUNNING))  in scsi_restart_operations()
2048 		if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_restart_operations()
2049 			BUG_ON(scsi_host_set_state(shost, SHOST_DEL));  in scsi_restart_operations()
2050 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2052 	wake_up(&shost->host_wait);  in scsi_restart_operations()
2060 	scsi_run_host_queues(shost);  in scsi_restart_operations()
2070 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2071 	if (shost->host_eh_scheduled)  in scsi_restart_operations()
2072 		if (scsi_host_set_state(shost, SHOST_RECOVERY))  in scsi_restart_operations()
2073 			WARN_ON(scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY));  in scsi_restart_operations()
2074 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2083 void scsi_eh_ready_devs(struct Scsi_Host *shost,  in scsi_eh_ready_devs()  argument
2087 	if (!scsi_eh_stu(shost, work_q, done_q))  in scsi_eh_ready_devs()
2088 		if (!scsi_eh_bus_device_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2089 			if (!scsi_eh_target_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2090 				if (!scsi_eh_bus_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2091 					if (!scsi_eh_host_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2155 static void scsi_unjam_host(struct Scsi_Host *shost)  in scsi_unjam_host()  argument
2161 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2162 	list_splice_init(&shost->eh_cmd_q, &eh_work_q);  in scsi_unjam_host()
2163 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2165 	SCSI_LOG_ERROR_RECOVERY(1, scsi_eh_prt_fail_stats(shost, &eh_work_q));  in scsi_unjam_host()
2168 		scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);  in scsi_unjam_host()
2170 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2171 	if (shost->eh_deadline != -1)  in scsi_unjam_host()
2172 		shost->last_reset = 0;  in scsi_unjam_host()
2173 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2187 	struct Scsi_Host *shost = data;  in scsi_error_handler()  local
2206 		if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||  in scsi_error_handler()
2207 		    shost->host_failed != scsi_host_busy(shost)) {  in scsi_error_handler()
2209 				shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2211 					     shost->host_no));  in scsi_error_handler()
2218 			shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2220 				     shost->host_no, shost->host_eh_scheduled,  in scsi_error_handler()
2221 				     shost->host_failed,  in scsi_error_handler()
2222 				     scsi_host_busy(shost)));  in scsi_error_handler()
2229 		if (!shost->eh_noresume && scsi_autopm_get_host(shost) != 0) {  in scsi_error_handler()
2231 				shost_printk(KERN_ERR, shost,  in scsi_error_handler()
2233 					     shost->host_no));  in scsi_error_handler()
2237 		if (shost->transportt->eh_strategy_handler)  in scsi_error_handler()
2238 			shost->transportt->eh_strategy_handler(shost);  in scsi_error_handler()
2240 			scsi_unjam_host(shost);  in scsi_error_handler()
2243 		shost->host_failed = 0;  in scsi_error_handler()
2252 		scsi_restart_operations(shost);  in scsi_error_handler()
2253 		if (!shost->eh_noresume)  in scsi_error_handler()
2254 			scsi_autopm_put_host(shost);  in scsi_error_handler()
2259 		shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2261 			     shost->host_no));  in scsi_error_handler()
2262 	shost->ehandler = NULL;  in scsi_error_handler()
2287 void scsi_report_bus_reset(struct Scsi_Host *shost, int channel)  in scsi_report_bus_reset()  argument
2291 	__shost_for_each_device(sdev, shost) {  in scsi_report_bus_reset()
2320 void scsi_report_device_reset(struct Scsi_Host *shost, int channel, int target)  in scsi_report_device_reset()  argument
2324 	__shost_for_each_device(sdev, shost) {  in scsi_report_device_reset()
2346 	struct Scsi_Host *shost = dev->host;  in scsi_ioctl_reset()  local
2358 	if (scsi_autopm_get_host(shost) < 0)  in scsi_ioctl_reset()
2363 			shost->hostt->cmd_size, GFP_KERNEL);  in scsi_ioctl_reset()
2380 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2381 	shost->tmf_in_progress = 1;  in scsi_ioctl_reset()
2382 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2415 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2416 	shost->tmf_in_progress = 0;  in scsi_ioctl_reset()
2417 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2424 		shost_printk(KERN_INFO, shost,  in scsi_ioctl_reset()
2427 	wake_up(&shost->host_wait);  in scsi_ioctl_reset()
2428 	scsi_run_host_queues(shost);  in scsi_ioctl_reset()
2433 	scsi_autopm_put_host(shost);  in scsi_ioctl_reset()