IB/iser: Remove redundant cmd_data_len calculation

This code was added before we had protection data length
calculation (in iser_send_command), so we needed to calc
the sg data length from the sg itself. This is not needed
anymore.

This patch does not change any functionality.

Signed-off-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Adir Lev <adirl@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

drivers/infiniband/ulp/iser/iser_memory.c

@@ -53,12 +53,9 @@ static int iser_start_rdma_unaligned_sg(struct iscsi_iser_task *iser_task,
 	struct scatterlist *sgl = (struct scatterlist *)data->buf;
 	struct scatterlist *sg;
 	char *mem = NULL;
-	unsigned long  cmd_data_len = 0;
+	unsigned long  cmd_data_len = data->data_len;
 	int dma_nents, i;
 
-	for_each_sg(sgl, sg, data->size, i)
-		cmd_data_len += ib_sg_dma_len(dev, sg);
-
 	if (cmd_data_len > ISER_KMALLOC_THRESHOLD)
 		mem = (void *)__get_free_pages(GFP_ATOMIC,
 		      ilog2(roundup_pow_of_two(cmd_data_len)) - PAGE_SHIFT);