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()
189 	struct Scsi_Host *shost = sdev->host;  in scsi_abort_command()  local
203 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_abort_command()
204 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_abort_command()
205 		shost->last_reset = jiffies;  in scsi_abort_command()
206 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_abort_command()
211 	queue_delayed_work(shost->tmf_work_q, &scmd->abort_work, HZ / 100);  in scsi_abort_command()
235 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_inc_host_failed()  local
238 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
239 	shost->host_failed++;  in scsi_eh_inc_host_failed()
240 	scsi_eh_wakeup(shost);  in scsi_eh_inc_host_failed()
241 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
250 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_scmd_add()  local
254 	WARN_ON_ONCE(!shost->ehandler);  in scsi_eh_scmd_add()
256 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_scmd_add()
257 	if (scsi_host_set_state(shost, SHOST_RECOVERY)) {  in scsi_eh_scmd_add()
258 		ret = scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY);  in scsi_eh_scmd_add()
261 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_eh_scmd_add()
262 		shost->last_reset = jiffies;  in scsi_eh_scmd_add()
265 	list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);  in scsi_eh_scmd_add()
266 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_scmd_add()
352 static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,  in scsi_eh_prt_fail_stats()  argument
362 	shost_for_each_device(sdev, shost) {  in scsi_eh_prt_fail_stats()
375 				shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
385 	SCSI_LOG_ERROR_RECOVERY(2, shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
1059 	struct Scsi_Host *shost = sdev->host;  in scsi_send_eh_cmnd()  local
1068 	shost->eh_action = &done;  in scsi_send_eh_cmnd()
1090 		rtn = shost->hostt->queuecommand(shost, scmd);  in scsi_send_eh_cmnd()
1110 	shost->eh_action = NULL;  in scsi_send_eh_cmnd()
1220 	struct Scsi_Host *shost;  in scsi_eh_get_sense()  local
1232 		shost = scmd->device->host;  in scsi_eh_get_sense()
1233 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_get_sense()
1402 static int scsi_eh_stu(struct Scsi_Host *shost,  in scsi_eh_stu()  argument
1409 	shost_for_each_device(sdev, shost) {  in scsi_eh_stu()
1410 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_stu()
1467 static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,  in scsi_eh_bus_device_reset()  argument
1475 	shost_for_each_device(sdev, shost) {  in scsi_eh_bus_device_reset()
1476 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_device_reset()
1528 static int scsi_eh_target_reset(struct Scsi_Host *shost,  in scsi_eh_target_reset()  argument
1542 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_target_reset()
1547 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1557 			shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1563 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1590 static int scsi_eh_bus_reset(struct Scsi_Host *shost,  in scsi_eh_bus_reset()  argument
1606 	for (channel = 0; channel <= shost->max_channel; channel++) {  in scsi_eh_bus_reset()
1607 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_reset()
1610 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1631 			shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1648 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1662 static int scsi_eh_host_reset(struct Scsi_Host *shost,  in scsi_eh_host_reset()  argument
1675 			shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
1688 				shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
2005 static void scsi_restart_operations(struct Scsi_Host *shost)  in scsi_restart_operations()  argument
2015 	shost_for_each_device(sdev, shost) {  in scsi_restart_operations()
2028 		shost_printk(KERN_INFO, shost, "waking up host to restart\n"));  in scsi_restart_operations()
2030 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2031 	if (scsi_host_set_state(shost, SHOST_RUNNING))  in scsi_restart_operations()
2032 		if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_restart_operations()
2033 			BUG_ON(scsi_host_set_state(shost, SHOST_DEL));  in scsi_restart_operations()
2034 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2036 	wake_up(&shost->host_wait);  in scsi_restart_operations()
2044 	scsi_run_host_queues(shost);  in scsi_restart_operations()
2054 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2055 	if (shost->host_eh_scheduled)  in scsi_restart_operations()
2056 		if (scsi_host_set_state(shost, SHOST_RECOVERY))  in scsi_restart_operations()
2057 			WARN_ON(scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY));  in scsi_restart_operations()
2058 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2067 void scsi_eh_ready_devs(struct Scsi_Host *shost,  in scsi_eh_ready_devs()  argument
2071 	if (!scsi_eh_stu(shost, work_q, done_q))  in scsi_eh_ready_devs()
2072 		if (!scsi_eh_bus_device_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2073 			if (!scsi_eh_target_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2074 				if (!scsi_eh_bus_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2075 					if (!scsi_eh_host_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2140 static void scsi_unjam_host(struct Scsi_Host *shost)  in scsi_unjam_host()  argument
2146 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2147 	list_splice_init(&shost->eh_cmd_q, &eh_work_q);  in scsi_unjam_host()
2148 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2150 	SCSI_LOG_ERROR_RECOVERY(1, scsi_eh_prt_fail_stats(shost, &eh_work_q));  in scsi_unjam_host()
2153 		scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);  in scsi_unjam_host()
2155 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2156 	if (shost->eh_deadline != -1)  in scsi_unjam_host()
2157 		shost->last_reset = 0;  in scsi_unjam_host()
2158 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2172 	struct Scsi_Host *shost = data;  in scsi_error_handler()  local
2191 		if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||  in scsi_error_handler()
2192 		    shost->host_failed != scsi_host_busy(shost)) {  in scsi_error_handler()
2194 				shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2196 					     shost->host_no));  in scsi_error_handler()
2203 			shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2205 				     shost->host_no, shost->host_eh_scheduled,  in scsi_error_handler()
2206 				     shost->host_failed,  in scsi_error_handler()
2207 				     scsi_host_busy(shost)));  in scsi_error_handler()
2214 		if (!shost->eh_noresume && scsi_autopm_get_host(shost) != 0) {  in scsi_error_handler()
2216 				shost_printk(KERN_ERR, shost,  in scsi_error_handler()
2218 					     shost->host_no));  in scsi_error_handler()
2222 		if (shost->transportt->eh_strategy_handler)  in scsi_error_handler()
2223 			shost->transportt->eh_strategy_handler(shost);  in scsi_error_handler()
2225 			scsi_unjam_host(shost);  in scsi_error_handler()
2228 		shost->host_failed = 0;  in scsi_error_handler()
2237 		scsi_restart_operations(shost);  in scsi_error_handler()
2238 		if (!shost->eh_noresume)  in scsi_error_handler()
2239 			scsi_autopm_put_host(shost);  in scsi_error_handler()
2244 		shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2246 			     shost->host_no));  in scsi_error_handler()
2247 	shost->ehandler = NULL;  in scsi_error_handler()
2272 void scsi_report_bus_reset(struct Scsi_Host *shost, int channel)  in scsi_report_bus_reset()  argument
2276 	__shost_for_each_device(sdev, shost) {  in scsi_report_bus_reset()
2305 void scsi_report_device_reset(struct Scsi_Host *shost, int channel, int target)  in scsi_report_device_reset()  argument
2309 	__shost_for_each_device(sdev, shost) {  in scsi_report_device_reset()
2331 	struct Scsi_Host *shost = dev->host;  in scsi_ioctl_reset()  local
2343 	if (scsi_autopm_get_host(shost) < 0)  in scsi_ioctl_reset()
2348 			shost->hostt->cmd_size, GFP_KERNEL);  in scsi_ioctl_reset()
2365 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2366 	shost->tmf_in_progress = 1;  in scsi_ioctl_reset()
2367 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2400 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2401 	shost->tmf_in_progress = 0;  in scsi_ioctl_reset()
2402 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2409 		shost_printk(KERN_INFO, shost,  in scsi_ioctl_reset()
2412 	wake_up(&shost->host_wait);  in scsi_ioctl_reset()
2413 	scsi_run_host_queues(shost);  in scsi_ioctl_reset()
2419 	scsi_autopm_put_host(shost);  in scsi_ioctl_reset()