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Commit 5e32066d authored by Govindarajulu Varadarajan's avatar Govindarajulu Varadarajan Committed by David S. Miller
Browse files

enic: make vnic_wq_buf doubly linked 



This patch makes vnic_wq_buf doubly liked list. This is needed for dma_mapping
error check, in case some frag's dma map fails, we need to move back and remove
previously queued buffers.

Signed-off-by: default avatarGovindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 5164172f

drivers/net/ethernet/cisco/enic/vnic_wq.c

+3 −0
Original line number Diff line number Diff line
@@ -47,11 +47,14 @@ static int vnic_wq_alloc_bufs(struct vnic_wq *wq) 
				wq->ring.desc_size * buf->index;

			if (buf->index + 1 == count) {

				buf->next = wq->bufs[0];

				buf->next->prev = buf;

				break;

			} else if (j + 1 == VNIC_WQ_BUF_BLK_ENTRIES(count)) {

				buf->next = wq->bufs[i + 1];

				buf->next->prev = buf;

			} else {

				buf->next = buf + 1;

				buf->next->prev = buf;

				buf++;

			}

		}

drivers/net/ethernet/cisco/enic/vnic_wq.h

+1 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ struct vnic_wq_buf { 
	uint8_t cq_entry; /* Gets completion event from hw */

	uint8_t desc_skip_cnt; /* Num descs to occupy */

	uint8_t compressed_send; /* Both hdr and payload in one desc */

	struct vnic_wq_buf *prev;

};



/* Break the vnic_wq_buf allocations into blocks of 32/64 entries */