[SCSI] ipr: Disk remove path cleanup

Instead of NULLing the resource entry pointer when a disk
goes away to prevent any new commands being sent to it,
set the adapter resource handle to an invalid value so
new ops getting sent to it will fail with a selection timeout
response. This patch is needed for future SATA patches.
Signed-off-by: NBrian King <brking@us.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/ipr.c

@@ -869,8 +869,8 @@ static void ipr_handle_config_change(struct ipr_ioa_cfg *ioa_cfg,
 
 	if (hostrcb->hcam.notify_type == IPR_HOST_RCB_NOTIF_TYPE_REM_ENTRY) {
 		if (res->sdev) {
-			res->sdev->hostdata = NULL;
 			res->del_from_ml = 1;
+			res->cfgte.res_handle = IPR_INVALID_RES_HANDLE;
 			if (ioa_cfg->allow_ml_add_del)
 				schedule_work(&ioa_cfg->work_q);
 		} else
@@ -2107,7 +2107,6 @@ static void ipr_worker_thread(void *data)
 				did_work = 1;
 				sdev = res->sdev;
 				if (!scsi_device_get(sdev)) {
-					res->sdev = NULL;
 					list_move_tail(&res->queue, &ioa_cfg->free_res_q);
 					spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
 					scsi_remove_device(sdev);
@@ -2124,6 +2123,7 @@ static void ipr_worker_thread(void *data)
 			bus = res->cfgte.res_addr.bus;
 			target = res->cfgte.res_addr.target;
 			lun = res->cfgte.res_addr.lun;
+			res->add_to_ml = 0;
 			spin_unlock_irqrestore(ioa_cfg->host->host_lock, lock_flags);
 			scsi_add_device(ioa_cfg->host, bus, target, lun);
 			spin_lock_irqsave(ioa_cfg->host->host_lock, lock_flags);
@@ -4980,7 +4980,7 @@ static int ipr_init_res_table(struct ipr_cmnd *ipr_cmd)
 	list_for_each_entry_safe(res, temp, &old_res, queue) {
 		if (res->sdev) {
 			res->del_from_ml = 1;
-			res->sdev->hostdata = NULL;
+			res->cfgte.res_handle = IPR_INVALID_RES_HANDLE;
 			list_move_tail(&res->queue, &ioa_cfg->used_res_q);
 		} else {
 			list_move_tail(&res->queue, &ioa_cfg->free_res_q);

drivers/scsi/ipr.h

@@ -133,6 +133,7 @@
 #define IPR_MAX_SCSI_RATE(width) ((320 * 10) / ((width) / 8))
 
 #define IPR_IOA_RES_HANDLE				0xffffffff
+#define IPR_INVALID_RES_HANDLE			0
 #define IPR_IOA_RES_ADDR				0x00ffffff
 
 /*