[SCSI] ibmvfc: Fixup GFP flags for target allocations

Since target allocations can occur while resetting the virtual adapter,
we shouldn't be using GFP_KERNEL for them as it could hang. Switch to
use GFP_NOIO.
Signed-off-by: NBrian King <brking@linux.vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

drivers/scsi/ibmvscsi/ibmvfc.c

@@ -3420,7 +3420,7 @@ static int ibmvfc_alloc_target(struct ibmvfc_host *vhost, u64 scsi_id)
 	}
 	spin_unlock_irqrestore(vhost->host->host_lock, flags);
 
-	tgt = mempool_alloc(vhost->tgt_pool, GFP_KERNEL);
+	tgt = mempool_alloc(vhost->tgt_pool, GFP_NOIO);
 	if (!tgt) {
 		dev_err(vhost->dev, "Target allocation failure for scsi id %08llx\n",
 			scsi_id);