61 void scsi_eh_wakeup(struct Scsi_Host *shost)  in scsi_eh_wakeup()  argument
63 	if (atomic_read(&shost->host_busy) == shost->host_failed) {  in scsi_eh_wakeup()
64 		trace_scsi_eh_wakeup(shost);  in scsi_eh_wakeup()
65 		wake_up_process(shost->ehandler);  in scsi_eh_wakeup()
66 		SCSI_LOG_ERROR_RECOVERY(5, shost_printk(KERN_INFO, shost,  in scsi_eh_wakeup()
77 void scsi_schedule_eh(struct Scsi_Host *shost)  in scsi_schedule_eh()  argument
81 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_schedule_eh()
83 	if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 ||  in scsi_schedule_eh()
84 	    scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) {  in scsi_schedule_eh()
85 		shost->host_eh_scheduled++;  in scsi_schedule_eh()
86 		scsi_eh_wakeup(shost);  in scsi_schedule_eh()
89 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_schedule_eh()
93 static int scsi_host_eh_past_deadline(struct Scsi_Host *shost)  in scsi_host_eh_past_deadline()  argument
95 	if (!shost->last_reset || shost->eh_deadline == -1)  in scsi_host_eh_past_deadline()
105 	if (time_before(jiffies, shost->last_reset + shost->eh_deadline) &&  in scsi_host_eh_past_deadline()
106 	    shost->eh_deadline > -1)  in scsi_host_eh_past_deadline()
182 	struct Scsi_Host *shost = sdev->host;  in scsi_abort_command()  local
201 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_abort_command()
202 	if (scsi_host_in_recovery(shost)) {  in scsi_abort_command()
203 		spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_abort_command()
210 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_abort_command()
211 		shost->last_reset = jiffies;  in scsi_abort_command()
212 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_abort_command()
217 	queue_delayed_work(shost->tmf_work_q, &scmd->abort_work, HZ / 100);  in scsi_abort_command()
231 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_scmd_add()  local
235 	if (!shost->ehandler)  in scsi_eh_scmd_add()
238 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_scmd_add()
239 	if (scsi_host_set_state(shost, SHOST_RECOVERY))  in scsi_eh_scmd_add()
240 		if (scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY))  in scsi_eh_scmd_add()
243 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_eh_scmd_add()
244 		shost->last_reset = jiffies;  in scsi_eh_scmd_add()
250 	list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);  in scsi_eh_scmd_add()
251 	shost->host_failed++;  in scsi_eh_scmd_add()
252 	scsi_eh_wakeup(shost);  in scsi_eh_scmd_add()
254 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_scmd_add()
330 static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,  in scsi_eh_prt_fail_stats()  argument
340 	shost_for_each_device(sdev, shost) {  in scsi_eh_prt_fail_stats()
353 				shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
363 	SCSI_LOG_ERROR_RECOVERY(2, shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
1014 	struct Scsi_Host *shost = sdev->host;  in scsi_send_eh_cmnd()  local
1023 	shost->eh_action = &done;  in scsi_send_eh_cmnd()
1027 	rtn = shost->hostt->queuecommand(shost, scmd);  in scsi_send_eh_cmnd()
1043 	shost->eh_action = NULL;  in scsi_send_eh_cmnd()
1155 	struct Scsi_Host *shost;  in scsi_eh_get_sense()  local
1163 		shost = scmd->device->host;  in scsi_eh_get_sense()
1164 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_get_sense()
1318 	struct Scsi_Host *shost;  in scsi_eh_abort_cmds()  local
1323 		shost = scmd->device->host;  in scsi_eh_abort_cmds()
1324 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_abort_cmds()
1335 		rtn = scsi_try_to_abort_cmd(shost->hostt, scmd);  in scsi_eh_abort_cmds()
1388 static int scsi_eh_stu(struct Scsi_Host *shost,  in scsi_eh_stu()  argument
1395 	shost_for_each_device(sdev, shost) {  in scsi_eh_stu()
1396 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_stu()
1453 static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,  in scsi_eh_bus_device_reset()  argument
1461 	shost_for_each_device(sdev, shost) {  in scsi_eh_bus_device_reset()
1462 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_device_reset()
1514 static int scsi_eh_target_reset(struct Scsi_Host *shost,  in scsi_eh_target_reset()  argument
1528 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_target_reset()
1533 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1543 			shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1549 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1576 static int scsi_eh_bus_reset(struct Scsi_Host *shost,  in scsi_eh_bus_reset()  argument
1592 	for (channel = 0; channel <= shost->max_channel; channel++) {  in scsi_eh_bus_reset()
1593 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_reset()
1596 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1617 			shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1634 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1648 static int scsi_eh_host_reset(struct Scsi_Host *shost,  in scsi_eh_host_reset()  argument
1661 			shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
1674 				shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
1996 static void scsi_restart_operations(struct Scsi_Host *shost)  in scsi_restart_operations()  argument
2006 	shost_for_each_device(sdev, shost) {  in scsi_restart_operations()
2019 		shost_printk(KERN_INFO, shost, "waking up host to restart\n"));  in scsi_restart_operations()
2021 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2022 	if (scsi_host_set_state(shost, SHOST_RUNNING))  in scsi_restart_operations()
2023 		if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_restart_operations()
2024 			BUG_ON(scsi_host_set_state(shost, SHOST_DEL));  in scsi_restart_operations()
2025 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2027 	wake_up(&shost->host_wait);  in scsi_restart_operations()
2035 	scsi_run_host_queues(shost);  in scsi_restart_operations()
2045 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2046 	if (shost->host_eh_scheduled)  in scsi_restart_operations()
2047 		if (scsi_host_set_state(shost, SHOST_RECOVERY))  in scsi_restart_operations()
2048 			WARN_ON(scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY));  in scsi_restart_operations()
2049 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2058 void scsi_eh_ready_devs(struct Scsi_Host *shost,  in scsi_eh_ready_devs()  argument
2062 	if (!scsi_eh_stu(shost, work_q, done_q))  in scsi_eh_ready_devs()
2063 		if (!scsi_eh_bus_device_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2064 			if (!scsi_eh_target_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2065 				if (!scsi_eh_bus_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2066 					if (!scsi_eh_host_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2131 static void scsi_unjam_host(struct Scsi_Host *shost)  in scsi_unjam_host()  argument
2137 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2138 	list_splice_init(&shost->eh_cmd_q, &eh_work_q);  in scsi_unjam_host()
2139 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2141 	SCSI_LOG_ERROR_RECOVERY(1, scsi_eh_prt_fail_stats(shost, &eh_work_q));  in scsi_unjam_host()
2145 			scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);  in scsi_unjam_host()
2147 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2148 	if (shost->eh_deadline != -1)  in scsi_unjam_host()
2149 		shost->last_reset = 0;  in scsi_unjam_host()
2150 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2164 	struct Scsi_Host *shost = data;  in scsi_error_handler()  local
2183 		if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||  in scsi_error_handler()
2184 		    shost->host_failed != atomic_read(&shost->host_busy)) {  in scsi_error_handler()
2186 				shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2188 					     shost->host_no));  in scsi_error_handler()
2195 			shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2197 				     shost->host_no, shost->host_eh_scheduled,  in scsi_error_handler()
2198 				     shost->host_failed,  in scsi_error_handler()
2199 				     atomic_read(&shost->host_busy)));  in scsi_error_handler()
2206 		if (!shost->eh_noresume && scsi_autopm_get_host(shost) != 0) {  in scsi_error_handler()
2208 				shost_printk(KERN_ERR, shost,  in scsi_error_handler()
2210 					     shost->host_no));  in scsi_error_handler()
2214 		if (shost->transportt->eh_strategy_handler)  in scsi_error_handler()
2215 			shost->transportt->eh_strategy_handler(shost);  in scsi_error_handler()
2217 			scsi_unjam_host(shost);  in scsi_error_handler()
2226 		scsi_restart_operations(shost);  in scsi_error_handler()
2227 		if (!shost->eh_noresume)  in scsi_error_handler()
2228 			scsi_autopm_put_host(shost);  in scsi_error_handler()
2233 		shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2235 			     shost->host_no));  in scsi_error_handler()
2236 	shost->ehandler = NULL;  in scsi_error_handler()
2261 void scsi_report_bus_reset(struct Scsi_Host *shost, int channel)  in scsi_report_bus_reset()  argument
2265 	__shost_for_each_device(sdev, shost) {  in scsi_report_bus_reset()
2294 void scsi_report_device_reset(struct Scsi_Host *shost, int channel, int target)  in scsi_report_device_reset()  argument
2298 	__shost_for_each_device(sdev, shost) {  in scsi_report_device_reset()
2320 	struct Scsi_Host *shost = dev->host;  in scsi_ioctl_reset()  local
2332 	if (scsi_autopm_get_host(shost) < 0)  in scsi_ioctl_reset()
2352 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2353 	shost->tmf_in_progress = 1;  in scsi_ioctl_reset()
2354 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2387 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2388 	shost->tmf_in_progress = 0;  in scsi_ioctl_reset()
2389 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2396 		shost_printk(KERN_INFO, shost,  in scsi_ioctl_reset()
2399 	wake_up(&shost->host_wait);  in scsi_ioctl_reset()
2400 	scsi_run_host_queues(shost);  in scsi_ioctl_reset()
2405 	scsi_autopm_put_host(shost);  in scsi_ioctl_reset()