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()
209 	struct Scsi_Host *shost = sdev->host;  in scsi_abort_command()  local
223 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_abort_command()
224 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_abort_command()
225 		shost->last_reset = jiffies;  in scsi_abort_command()
226 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_abort_command()
231 	queue_delayed_work(shost->tmf_work_q, &scmd->abort_work, HZ / 100);  in scsi_abort_command()
255 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_inc_host_failed()  local
258 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
259 	shost->host_failed++;  in scsi_eh_inc_host_failed()
260 	scsi_eh_wakeup(shost);  in scsi_eh_inc_host_failed()
261 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
270 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_scmd_add()  local
274 	WARN_ON_ONCE(!shost->ehandler);  in scsi_eh_scmd_add()
276 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_scmd_add()
277 	if (scsi_host_set_state(shost, SHOST_RECOVERY)) {  in scsi_eh_scmd_add()
278 		ret = scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY);  in scsi_eh_scmd_add()
281 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_eh_scmd_add()
282 		shost->last_reset = jiffies;  in scsi_eh_scmd_add()
285 	list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);  in scsi_eh_scmd_add()
286 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_scmd_add()
372 static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,  in scsi_eh_prt_fail_stats()  argument
382 	shost_for_each_device(sdev, shost) {  in scsi_eh_prt_fail_stats()
395 				shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
405 	SCSI_LOG_ERROR_RECOVERY(2, shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
1073 	struct Scsi_Host *shost = sdev->host;  in scsi_send_eh_cmnd()  local
1082 	shost->eh_action = &done;  in scsi_send_eh_cmnd()
1104 		rtn = shost->hostt->queuecommand(shost, scmd);  in scsi_send_eh_cmnd()
1124 	shost->eh_action = NULL;  in scsi_send_eh_cmnd()
1235 	struct Scsi_Host *shost;  in scsi_eh_get_sense()  local
1247 		shost = scmd->device->host;  in scsi_eh_get_sense()
1248 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_get_sense()
1426 static int scsi_eh_stu(struct Scsi_Host *shost,  in scsi_eh_stu()  argument
1433 	shost_for_each_device(sdev, shost) {  in scsi_eh_stu()
1434 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_stu()
1492 static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,  in scsi_eh_bus_device_reset()  argument
1500 	shost_for_each_device(sdev, shost) {  in scsi_eh_bus_device_reset()
1501 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_device_reset()
1554 static int scsi_eh_target_reset(struct Scsi_Host *shost,  in scsi_eh_target_reset()  argument
1568 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_target_reset()
1573 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1583 			shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1589 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1616 static int scsi_eh_bus_reset(struct Scsi_Host *shost,  in scsi_eh_bus_reset()  argument
1632 	for (channel = 0; channel <= shost->max_channel; channel++) {  in scsi_eh_bus_reset()
1633 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_reset()
1636 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1657 			shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1674 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1688 static int scsi_eh_host_reset(struct Scsi_Host *shost,  in scsi_eh_host_reset()  argument
1701 			shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
1714 				shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
2029 static void scsi_restart_operations(struct Scsi_Host *shost)  in scsi_restart_operations()  argument
2039 	shost_for_each_device(sdev, shost) {  in scsi_restart_operations()
2052 		shost_printk(KERN_INFO, shost, "waking up host to restart\n"));  in scsi_restart_operations()
2054 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2055 	if (scsi_host_set_state(shost, SHOST_RUNNING))  in scsi_restart_operations()
2056 		if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_restart_operations()
2057 			BUG_ON(scsi_host_set_state(shost, SHOST_DEL));  in scsi_restart_operations()
2058 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2060 	wake_up(&shost->host_wait);  in scsi_restart_operations()
2068 	scsi_run_host_queues(shost);  in scsi_restart_operations()
2078 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2079 	if (shost->host_eh_scheduled)  in scsi_restart_operations()
2080 		if (scsi_host_set_state(shost, SHOST_RECOVERY))  in scsi_restart_operations()
2081 			WARN_ON(scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY));  in scsi_restart_operations()
2082 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2091 void scsi_eh_ready_devs(struct Scsi_Host *shost,  in scsi_eh_ready_devs()  argument
2095 	if (!scsi_eh_stu(shost, work_q, done_q))  in scsi_eh_ready_devs()
2096 		if (!scsi_eh_bus_device_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2097 			if (!scsi_eh_target_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2098 				if (!scsi_eh_bus_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2099 					if (!scsi_eh_host_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2164 static void scsi_unjam_host(struct Scsi_Host *shost)  in scsi_unjam_host()  argument
2170 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2171 	list_splice_init(&shost->eh_cmd_q, &eh_work_q);  in scsi_unjam_host()
2172 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2174 	SCSI_LOG_ERROR_RECOVERY(1, scsi_eh_prt_fail_stats(shost, &eh_work_q));  in scsi_unjam_host()
2177 		scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);  in scsi_unjam_host()
2179 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2180 	if (shost->eh_deadline != -1)  in scsi_unjam_host()
2181 		shost->last_reset = 0;  in scsi_unjam_host()
2182 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2196 	struct Scsi_Host *shost = data;  in scsi_error_handler()  local
2215 		if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||  in scsi_error_handler()
2216 		    shost->host_failed != scsi_host_busy(shost)) {  in scsi_error_handler()
2218 				shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2220 					     shost->host_no));  in scsi_error_handler()
2227 			shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2229 				     shost->host_no, shost->host_eh_scheduled,  in scsi_error_handler()
2230 				     shost->host_failed,  in scsi_error_handler()
2231 				     scsi_host_busy(shost)));  in scsi_error_handler()
2238 		if (!shost->eh_noresume && scsi_autopm_get_host(shost) != 0) {  in scsi_error_handler()
2240 				shost_printk(KERN_ERR, shost,  in scsi_error_handler()
2242 					     shost->host_no));  in scsi_error_handler()
2246 		if (shost->transportt->eh_strategy_handler)  in scsi_error_handler()
2247 			shost->transportt->eh_strategy_handler(shost);  in scsi_error_handler()
2249 			scsi_unjam_host(shost);  in scsi_error_handler()
2252 		shost->host_failed = 0;  in scsi_error_handler()
2261 		scsi_restart_operations(shost);  in scsi_error_handler()
2262 		if (!shost->eh_noresume)  in scsi_error_handler()
2263 			scsi_autopm_put_host(shost);  in scsi_error_handler()
2268 		shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2270 			     shost->host_no));  in scsi_error_handler()
2271 	shost->ehandler = NULL;  in scsi_error_handler()
2296 void scsi_report_bus_reset(struct Scsi_Host *shost, int channel)  in scsi_report_bus_reset()  argument
2300 	__shost_for_each_device(sdev, shost) {  in scsi_report_bus_reset()
2329 void scsi_report_device_reset(struct Scsi_Host *shost, int channel, int target)  in scsi_report_device_reset()  argument
2333 	__shost_for_each_device(sdev, shost) {  in scsi_report_device_reset()
2355 	struct Scsi_Host *shost = dev->host;  in scsi_ioctl_reset()  local
2368 	if (scsi_autopm_get_host(shost) < 0)  in scsi_ioctl_reset()
2373 			shost->hostt->cmd_size, GFP_KERNEL);  in scsi_ioctl_reset()
2389 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2390 	shost->tmf_in_progress = 1;  in scsi_ioctl_reset()
2391 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2424 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2425 	shost->tmf_in_progress = 0;  in scsi_ioctl_reset()
2426 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2433 		shost_printk(KERN_INFO, shost,  in scsi_ioctl_reset()
2436 	wake_up(&shost->host_wait);  in scsi_ioctl_reset()
2437 	scsi_run_host_queues(shost);  in scsi_ioctl_reset()
2442 	scsi_autopm_put_host(shost);  in scsi_ioctl_reset()