IB/iser: Delete an error message for a failed memory allocation in iser_send_data_out()

Omit an extra message for a memory allocation failure in this function.

This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/ulp/iser/iser_initiator.c

@@ -452,10 +452,8 @@ int iser_send_data_out(struct iscsi_conn *conn,
 		 __func__,(int)itt,(int)data_seg_len,(int)buf_offset);
 
 	tx_desc = kmem_cache_zalloc(ig.desc_cache, GFP_ATOMIC);
-	if (tx_desc == NULL) {
-		iser_err("Failed to alloc desc for post dataout\n");
+	if (!tx_desc)
 		return -ENOMEM;
-	}
 
 	tx_desc->type = ISCSI_TX_DATAOUT;
 	tx_desc->cqe.done = iser_dataout_comp;