64 void scsi_eh_wakeup(struct Scsi_Host *shost)  in scsi_eh_wakeup()  argument
66 	lockdep_assert_held(shost->host_lock);  in scsi_eh_wakeup()
68 	if (scsi_host_busy(shost) == shost->host_failed) {  in scsi_eh_wakeup()
69 		trace_scsi_eh_wakeup(shost);  in scsi_eh_wakeup()
70 		wake_up_process(shost->ehandler);  in scsi_eh_wakeup()
71 		SCSI_LOG_ERROR_RECOVERY(5, shost_printk(KERN_INFO, shost,  in scsi_eh_wakeup()
82 void scsi_schedule_eh(struct Scsi_Host *shost)  in scsi_schedule_eh()  argument
86 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_schedule_eh()
88 	if (scsi_host_set_state(shost, SHOST_RECOVERY) == 0 ||  in scsi_schedule_eh()
89 	    scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY) == 0) {  in scsi_schedule_eh()
90 		shost->host_eh_scheduled++;  in scsi_schedule_eh()
91 		scsi_eh_wakeup(shost);  in scsi_schedule_eh()
94 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_schedule_eh()
98 static int scsi_host_eh_past_deadline(struct Scsi_Host *shost)  in scsi_host_eh_past_deadline()  argument
100 	if (!shost->last_reset || shost->eh_deadline == -1)  in scsi_host_eh_past_deadline()
110 	if (time_before(jiffies, shost->last_reset + shost->eh_deadline) &&  in scsi_host_eh_past_deadline()
111 	    shost->eh_deadline > -1)  in scsi_host_eh_past_deadline()
152 	struct Scsi_Host *shost = sdev->host;  in scmd_eh_abort_handler()  local
156 	if (scsi_host_eh_past_deadline(shost)) {  in scmd_eh_abort_handler()
166 	rtn = scsi_try_to_abort_cmd(shost->hostt, scmd);  in scmd_eh_abort_handler()
176 	if (scsi_host_eh_past_deadline(shost)) {  in scmd_eh_abort_handler()
184 	spin_lock_irqsave(shost->host_lock, flags);  in scmd_eh_abort_handler()
191 	if (list_empty(&shost->eh_abort_list) &&  in scmd_eh_abort_handler()
192 	    list_empty(&shost->eh_cmd_q))  in scmd_eh_abort_handler()
193 		if (shost->eh_deadline != -1)  in scmd_eh_abort_handler()
194 			shost->last_reset = 0;  in scmd_eh_abort_handler()
196 	spin_unlock_irqrestore(shost->host_lock, flags);  in scmd_eh_abort_handler()
214 	spin_lock_irqsave(shost->host_lock, flags);  in scmd_eh_abort_handler()
216 	spin_unlock_irqrestore(shost->host_lock, flags);  in scmd_eh_abort_handler()
231 	struct Scsi_Host *shost = sdev->host;  in scsi_abort_command()  local
234 	if (!shost->hostt->eh_abort_handler) {  in scsi_abort_command()
250 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_abort_command()
251 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_abort_command()
252 		shost->last_reset = jiffies;  in scsi_abort_command()
254 	list_add_tail(&scmd->eh_entry, &shost->eh_abort_list);  in scsi_abort_command()
255 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_abort_command()
260 	queue_delayed_work(shost->tmf_work_q, &scmd->abort_work, HZ / 100);  in scsi_abort_command()
284 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_inc_host_failed()  local
287 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
288 	shost->host_failed++;  in scsi_eh_inc_host_failed()
289 	scsi_eh_wakeup(shost);  in scsi_eh_inc_host_failed()
290 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_inc_host_failed()
299 	struct Scsi_Host *shost = scmd->device->host;  in scsi_eh_scmd_add()  local
303 	WARN_ON_ONCE(!shost->ehandler);  in scsi_eh_scmd_add()
305 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_eh_scmd_add()
306 	if (scsi_host_set_state(shost, SHOST_RECOVERY)) {  in scsi_eh_scmd_add()
307 		ret = scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY);  in scsi_eh_scmd_add()
310 	if (shost->eh_deadline != -1 && !shost->last_reset)  in scsi_eh_scmd_add()
311 		shost->last_reset = jiffies;  in scsi_eh_scmd_add()
314 	list_add_tail(&scmd->eh_entry, &shost->eh_cmd_q);  in scsi_eh_scmd_add()
315 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_eh_scmd_add()
400 static inline void scsi_eh_prt_fail_stats(struct Scsi_Host *shost,  in scsi_eh_prt_fail_stats()  argument
410 	shost_for_each_device(sdev, shost) {  in scsi_eh_prt_fail_stats()
423 				shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
433 	SCSI_LOG_ERROR_RECOVERY(2, shost_printk(KERN_INFO, shost,  in scsi_eh_prt_fail_stats()
1142 	struct Scsi_Host *shost = sdev->host;  in scsi_send_eh_cmnd()  local
1151 	shost->eh_action = &done;  in scsi_send_eh_cmnd()
1173 		rtn = shost->hostt->queuecommand(shost, scmd);  in scsi_send_eh_cmnd()
1194 	shost->eh_action = NULL;  in scsi_send_eh_cmnd()
1305 	struct Scsi_Host *shost;  in scsi_eh_get_sense()  local
1317 		shost = scmd->device->host;  in scsi_eh_get_sense()
1318 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_get_sense()
1497 static int scsi_eh_stu(struct Scsi_Host *shost,  in scsi_eh_stu()  argument
1504 	shost_for_each_device(sdev, shost) {  in scsi_eh_stu()
1505 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_stu()
1563 static int scsi_eh_bus_device_reset(struct Scsi_Host *shost,  in scsi_eh_bus_device_reset()  argument
1571 	shost_for_each_device(sdev, shost) {  in scsi_eh_bus_device_reset()
1572 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_device_reset()
1625 static int scsi_eh_target_reset(struct Scsi_Host *shost,  in scsi_eh_target_reset()  argument
1639 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_target_reset()
1644 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1654 			shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1660 				shost_printk(KERN_INFO, shost,  in scsi_eh_target_reset()
1687 static int scsi_eh_bus_reset(struct Scsi_Host *shost,  in scsi_eh_bus_reset()  argument
1703 	for (channel = 0; channel <= shost->max_channel; channel++) {  in scsi_eh_bus_reset()
1704 		if (scsi_host_eh_past_deadline(shost)) {  in scsi_eh_bus_reset()
1707 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1728 			shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1745 				shost_printk(KERN_INFO, shost,  in scsi_eh_bus_reset()
1759 static int scsi_eh_host_reset(struct Scsi_Host *shost,  in scsi_eh_host_reset()  argument
1772 			shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
1785 				shost_printk(KERN_INFO, shost,  in scsi_eh_host_reset()
2113 static void scsi_restart_operations(struct Scsi_Host *shost)  in scsi_restart_operations()  argument
2123 	shost_for_each_device(sdev, shost) {  in scsi_restart_operations()
2136 		shost_printk(KERN_INFO, shost, "waking up host to restart\n"));  in scsi_restart_operations()
2138 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2139 	if (scsi_host_set_state(shost, SHOST_RUNNING))  in scsi_restart_operations()
2140 		if (scsi_host_set_state(shost, SHOST_CANCEL))  in scsi_restart_operations()
2141 			BUG_ON(scsi_host_set_state(shost, SHOST_DEL));  in scsi_restart_operations()
2142 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2144 	wake_up(&shost->host_wait);  in scsi_restart_operations()
2152 	scsi_run_host_queues(shost);  in scsi_restart_operations()
2162 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_restart_operations()
2163 	if (shost->host_eh_scheduled)  in scsi_restart_operations()
2164 		if (scsi_host_set_state(shost, SHOST_RECOVERY))  in scsi_restart_operations()
2165 			WARN_ON(scsi_host_set_state(shost, SHOST_CANCEL_RECOVERY));  in scsi_restart_operations()
2166 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_restart_operations()
2175 void scsi_eh_ready_devs(struct Scsi_Host *shost,  in scsi_eh_ready_devs()  argument
2179 	if (!scsi_eh_stu(shost, work_q, done_q))  in scsi_eh_ready_devs()
2180 		if (!scsi_eh_bus_device_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2181 			if (!scsi_eh_target_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2182 				if (!scsi_eh_bus_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2183 					if (!scsi_eh_host_reset(shost, work_q, done_q))  in scsi_eh_ready_devs()
2249 static void scsi_unjam_host(struct Scsi_Host *shost)  in scsi_unjam_host()  argument
2255 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2256 	list_splice_init(&shost->eh_cmd_q, &eh_work_q);  in scsi_unjam_host()
2257 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2259 	SCSI_LOG_ERROR_RECOVERY(1, scsi_eh_prt_fail_stats(shost, &eh_work_q));  in scsi_unjam_host()
2262 		scsi_eh_ready_devs(shost, &eh_work_q, &eh_done_q);  in scsi_unjam_host()
2264 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_unjam_host()
2265 	if (shost->eh_deadline != -1)  in scsi_unjam_host()
2266 		shost->last_reset = 0;  in scsi_unjam_host()
2267 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_unjam_host()
2281 	struct Scsi_Host *shost = data;  in scsi_error_handler()  local
2300 		if ((shost->host_failed == 0 && shost->host_eh_scheduled == 0) ||  in scsi_error_handler()
2301 		    shost->host_failed != scsi_host_busy(shost)) {  in scsi_error_handler()
2303 				shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2305 					     shost->host_no));  in scsi_error_handler()
2312 			shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2314 				     shost->host_no, shost->host_eh_scheduled,  in scsi_error_handler()
2315 				     shost->host_failed,  in scsi_error_handler()
2316 				     scsi_host_busy(shost)));  in scsi_error_handler()
2323 		if (!shost->eh_noresume && scsi_autopm_get_host(shost) != 0) {  in scsi_error_handler()
2325 				shost_printk(KERN_ERR, shost,  in scsi_error_handler()
2327 					     shost->host_no));  in scsi_error_handler()
2331 		if (shost->transportt->eh_strategy_handler)  in scsi_error_handler()
2332 			shost->transportt->eh_strategy_handler(shost);  in scsi_error_handler()
2334 			scsi_unjam_host(shost);  in scsi_error_handler()
2337 		shost->host_failed = 0;  in scsi_error_handler()
2346 		scsi_restart_operations(shost);  in scsi_error_handler()
2347 		if (!shost->eh_noresume)  in scsi_error_handler()
2348 			scsi_autopm_put_host(shost);  in scsi_error_handler()
2353 		shost_printk(KERN_INFO, shost,  in scsi_error_handler()
2355 			     shost->host_no));  in scsi_error_handler()
2356 	shost->ehandler = NULL;  in scsi_error_handler()
2381 void scsi_report_bus_reset(struct Scsi_Host *shost, int channel)  in scsi_report_bus_reset()  argument
2385 	__shost_for_each_device(sdev, shost) {  in scsi_report_bus_reset()
2414 void scsi_report_device_reset(struct Scsi_Host *shost, int channel, int target)  in scsi_report_device_reset()  argument
2418 	__shost_for_each_device(sdev, shost) {  in scsi_report_device_reset()
2435 	struct Scsi_Host *shost = dev->host;  in scsi_ioctl_reset()  local
2448 	if (scsi_autopm_get_host(shost) < 0)  in scsi_ioctl_reset()
2453 			shost->hostt->cmd_size, GFP_KERNEL);  in scsi_ioctl_reset()
2468 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2469 	shost->tmf_in_progress = 1;  in scsi_ioctl_reset()
2470 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2503 	spin_lock_irqsave(shost->host_lock, flags);  in scsi_ioctl_reset()
2504 	shost->tmf_in_progress = 0;  in scsi_ioctl_reset()
2505 	spin_unlock_irqrestore(shost->host_lock, flags);  in scsi_ioctl_reset()
2512 		shost_printk(KERN_INFO, shost,  in scsi_ioctl_reset()
2515 	wake_up(&shost->host_wait);  in scsi_ioctl_reset()
2516 	scsi_run_host_queues(shost);  in scsi_ioctl_reset()
2521 	scsi_autopm_put_host(shost);  in scsi_ioctl_reset()