65 void scsi_eh_wakeup(struct Scsi_Host *shost)  in scsi_eh_wakeup()  argument
67 	lockdep_assert_held(shost->host_lock);  in scsi_eh_wakeup()
69 	if (scsi_host_busy(shost) == shost->host_failed) {  in scsi_eh_wakeup()
70 		trace_scsi_eh_wakeup(shost);  in scsi_eh_wakeup()
71 		wake_up_process(shost->ehandler);  in scsi_eh_wakeup()
72 		SCSI_LOG_ERROR_RECOVERY(5, shost_printk(KERN_INFO, shost,  in scsi_eh_wakeup()
83 void scsi_schedule_eh(struct Scsi_Host *shost)  in scsi_schedule_eh()  argument
87 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_schedule_eh()
89 	if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 ||  in scsi_schedule_eh()
90 	    scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) {  in scsi_schedule_eh()
91 		shost->host_eh_scheduled++;  in scsi_schedule_eh()
92 		scsi_eh_wakeup(shost);  in scsi_schedule_eh()
95 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_schedule_eh()
99 static int scsi_host_eh_past_deadline(struct Scsi_Host *shost)  in scsi_host_eh_past_deadline()  argument
101 	if (!shost->last_reset || shost->eh_deadline == -1)  in scsi_host_eh_past_deadline()
111 	if (time_before(jiffies, shost->last_reset + shost->eh_deadline) &&  in scsi_host_eh_past_deadline()
112 	    shost->eh_deadline > -1)  in scsi_host_eh_past_deadline()
188 	struct Scsi_Host *shost = sdev->host;  in scsi_abort_command()  local
202 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_abort_command()
203 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_abort_command()
204 		shost->last_reset = jiffies;  in scsi_abort_command()
205 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_abort_command()
210 	queue_delayed_work(shost->tmf_work_q, &scmd->abort_work, HZ / 100);  in scsi_abort_command()
234 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_inc_host_failed()  local
237 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
238 	shost->host_failed++;  in scsi_eh_inc_host_failed()
239 	scsi_eh_wakeup(shost);  in scsi_eh_inc_host_failed()
240 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
249 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_scmd_add()  local
253 	WARN_ON_ONCE(!shost->ehandler);  in scsi_eh_scmd_add()
255 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_scmd_add()
256 	if (scsi_host_set_state(shost, SHOST_RECOVERY)) {  in scsi_eh_scmd_add()
257 		ret = scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY);  in scsi_eh_scmd_add()
260 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_eh_scmd_add()
261 		shost->last_reset = jiffies;  in scsi_eh_scmd_add()
264 	list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);  in scsi_eh_scmd_add()
265 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_scmd_add()
354 static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,  in scsi_eh_prt_fail_stats()  argument
364 	shost_for_each_device(sdev, shost) {  in scsi_eh_prt_fail_stats()
377 				shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
387 	SCSI_LOG_ERROR_RECOVERY(2, shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
1061 	struct Scsi_Host *shost = sdev->host;  in scsi_send_eh_cmnd()  local
1070 	shost->eh_action = &done;  in scsi_send_eh_cmnd()
1074 	rtn = shost->hostt->queuecommand(shost, scmd);  in scsi_send_eh_cmnd()
1090 	shost->eh_action = NULL;  in scsi_send_eh_cmnd()
1200 	struct Scsi_Host *shost;  in scsi_eh_get_sense()  local
1212 		shost = scmd->device->host;  in scsi_eh_get_sense()
1213 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_get_sense()
1382 static int scsi_eh_stu(struct Scsi_Host *shost,  in scsi_eh_stu()  argument
1389 	shost_for_each_device(sdev, shost) {  in scsi_eh_stu()
1390 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_stu()
1447 static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,  in scsi_eh_bus_device_reset()  argument
1455 	shost_for_each_device(sdev, shost) {  in scsi_eh_bus_device_reset()
1456 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_device_reset()
1508 static int scsi_eh_target_reset(struct Scsi_Host *shost,  in scsi_eh_target_reset()  argument
1522 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_target_reset()
1527 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1537 			shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1543 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1570 static int scsi_eh_bus_reset(struct Scsi_Host *shost,  in scsi_eh_bus_reset()  argument
1586 	for (channel = 0; channel <= shost->max_channel; channel++) {  in scsi_eh_bus_reset()
1587 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_reset()
1590 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1611 			shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1628 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1642 static int scsi_eh_host_reset(struct Scsi_Host *shost,  in scsi_eh_host_reset()  argument
1655 			shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
1668 				shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
1985 static void scsi_restart_operations(struct Scsi_Host *shost)  in scsi_restart_operations()  argument
1995 	shost_for_each_device(sdev, shost) {  in scsi_restart_operations()
2008 		shost_printk(KERN_INFO, shost, "waking up host to restart\n"));  in scsi_restart_operations()
2010 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2011 	if (scsi_host_set_state(shost, SHOST_RUNNING))  in scsi_restart_operations()
2012 		if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_restart_operations()
2013 			BUG_ON(scsi_host_set_state(shost, SHOST_DEL));  in scsi_restart_operations()
2014 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2016 	wake_up(&shost->host_wait);  in scsi_restart_operations()
2024 	scsi_run_host_queues(shost);  in scsi_restart_operations()
2034 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2035 	if (shost->host_eh_scheduled)  in scsi_restart_operations()
2036 		if (scsi_host_set_state(shost, SHOST_RECOVERY))  in scsi_restart_operations()
2037 			WARN_ON(scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY));  in scsi_restart_operations()
2038 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2047 void scsi_eh_ready_devs(struct Scsi_Host *shost,  in scsi_eh_ready_devs()  argument
2051 	if (!scsi_eh_stu(shost, work_q, done_q))  in scsi_eh_ready_devs()
2052 		if (!scsi_eh_bus_device_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2053 			if (!scsi_eh_target_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2054 				if (!scsi_eh_bus_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2055 					if (!scsi_eh_host_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2120 static void scsi_unjam_host(struct Scsi_Host *shost)  in scsi_unjam_host()  argument
2126 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2127 	list_splice_init(&shost->eh_cmd_q, &eh_work_q);  in scsi_unjam_host()
2128 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2130 	SCSI_LOG_ERROR_RECOVERY(1, scsi_eh_prt_fail_stats(shost, &eh_work_q));  in scsi_unjam_host()
2133 		scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);  in scsi_unjam_host()
2135 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2136 	if (shost->eh_deadline != -1)  in scsi_unjam_host()
2137 		shost->last_reset = 0;  in scsi_unjam_host()
2138 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2152 	struct Scsi_Host *shost = data;  in scsi_error_handler()  local
2171 		if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||  in scsi_error_handler()
2172 		    shost->host_failed != scsi_host_busy(shost)) {  in scsi_error_handler()
2174 				shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2176 					     shost->host_no));  in scsi_error_handler()
2183 			shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2185 				     shost->host_no, shost->host_eh_scheduled,  in scsi_error_handler()
2186 				     shost->host_failed,  in scsi_error_handler()
2187 				     scsi_host_busy(shost)));  in scsi_error_handler()
2194 		if (!shost->eh_noresume && scsi_autopm_get_host(shost) != 0) {  in scsi_error_handler()
2196 				shost_printk(KERN_ERR, shost,  in scsi_error_handler()
2198 					     shost->host_no));  in scsi_error_handler()
2202 		if (shost->transportt->eh_strategy_handler)  in scsi_error_handler()
2203 			shost->transportt->eh_strategy_handler(shost);  in scsi_error_handler()
2205 			scsi_unjam_host(shost);  in scsi_error_handler()
2208 		shost->host_failed = 0;  in scsi_error_handler()
2217 		scsi_restart_operations(shost);  in scsi_error_handler()
2218 		if (!shost->eh_noresume)  in scsi_error_handler()
2219 			scsi_autopm_put_host(shost);  in scsi_error_handler()
2224 		shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2226 			     shost->host_no));  in scsi_error_handler()
2227 	shost->ehandler = NULL;  in scsi_error_handler()
2252 void scsi_report_bus_reset(struct Scsi_Host *shost, int channel)  in scsi_report_bus_reset()  argument
2256 	__shost_for_each_device(sdev, shost) {  in scsi_report_bus_reset()
2285 void scsi_report_device_reset(struct Scsi_Host *shost, int channel, int target)  in scsi_report_device_reset()  argument
2289 	__shost_for_each_device(sdev, shost) {  in scsi_report_device_reset()
2311 	struct Scsi_Host *shost = dev->host;  in scsi_ioctl_reset()  local
2323 	if (scsi_autopm_get_host(shost) < 0)  in scsi_ioctl_reset()
2328 			shost->hostt->cmd_size, GFP_KERNEL);  in scsi_ioctl_reset()
2345 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2346 	shost->tmf_in_progress = 1;  in scsi_ioctl_reset()
2347 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2380 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2381 	shost->tmf_in_progress = 0;  in scsi_ioctl_reset()
2382 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2389 		shost_printk(KERN_INFO, shost,  in scsi_ioctl_reset()
2392 	wake_up(&shost->host_wait);  in scsi_ioctl_reset()
2393 	scsi_run_host_queues(shost);  in scsi_ioctl_reset()
2399 	scsi_autopm_put_host(shost);  in scsi_ioctl_reset()