Commit 6570ebc4 authored by Frank Blaschka's avatar Frank Blaschka Committed by David S. Miller
Browse files

qeth: EDDP does not work on large MTUs 



Fix filling the qdio buffers in EDDP mode.

Signed-off-by: default avatarFrank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: default avatarUrsula Braun <braunu@de.ibm.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent bc4b2b49

drivers/s390/net/qeth_eddp.c

+9 −7
Original line number Diff line number Diff line
@@ -159,13 +159,15 @@ qeth_eddp_fill_buffer(struct qeth_qdio_out_q *queue, 
		buffer = buf->buffer;

		/* fill one skb into buffer */

		for (i = 0; i < ctx->elements_per_skb; ++i){

			buffer->element[buf->next_element_to_fill].addr =

				ctx->elements[element].addr;

			buffer->element[buf->next_element_to_fill].length =

				ctx->elements[element].length;

			buffer->element[buf->next_element_to_fill].flags =

				ctx->elements[element].flags;

			if (ctx->elements[element].length != 0) {

				buffer->element[buf->next_element_to_fill].

				addr = ctx->elements[element].addr;

				buffer->element[buf->next_element_to_fill].

				length = ctx->elements[element].length;

				buffer->element[buf->next_element_to_fill].

				flags = ctx->elements[element].flags;

				buf->next_element_to_fill++;

			}

			element++;

			elements--;

		}

drivers/s390/net/qeth_main.c

+2 −1
Original line number Diff line number Diff line
@@ -4508,7 +4508,8 @@ qeth_do_send_packet(struct qeth_card *card, struct qeth_qdio_out_q *queue, 
			/* check if we have enough elements (including following

			 * free buffers) to handle eddp context */

			if (qeth_eddp_check_buffers_for_context(queue,ctx) < 0){

				printk("eddp tx_dropped 1\n");

				if (net_ratelimit())

					PRINT_WARN("eddp tx_dropped 1\n");

				rc = -EBUSY;

				goto out;

			}