[PATCH] ipr: Device remove cleanup

If a device disappears across an adapter reset, ipr schedules the device to be
removed from scsi core. Any ops sent to that device prior to its actual removal
end up getting sent to the adapter using a now invalid adapter resource handle.
Usually, the adapter will just fail the command and the failure will end up
looking like a selection timeout, but it is possible the resource handle
has been re-used by the adapter and we could be sending an op to a different
device than we think we are. This patch closes this window.
Signed-off-by: Brian King <brking@us.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

drivers/scsi/ipr.c

@@ -4500,6 +4500,7 @@ 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;
 			list_move_tail(&res->queue, &ioa_cfg->used_res_q);
 		} else {
 			list_move_tail(&res->queue, &ioa_cfg->free_res_q);