diff options
| author | Govindarajulu Varadarajan <_govind@gmx.com> | 2014-12-24 15:59:36 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-12-31 13:08:45 -0500 |
| commit | 5e32066d0085af3c53834323c90b7c69a8f788f6 (patch) | |
| tree | 376acdfa427eb59f247d7cdb452ee26c53215181 /drivers | |
| parent | 5164172f3350b631f869a9b856d8e0956015609e (diff) | |
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: Govindarajulu Varadarajan <_govind@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/vnic_wq.c | 3 | ||||
| -rw-r--r-- | drivers/net/ethernet/cisco/enic/vnic_wq.h | 1 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cisco/enic/vnic_wq.c b/drivers/net/ethernet/cisco/enic/vnic_wq.c index 3e6b8d54dafc..b5a1c937fad2 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_wq.c +++ b/drivers/net/ethernet/cisco/enic/vnic_wq.c @@ -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++; } } diff --git a/drivers/net/ethernet/cisco/enic/vnic_wq.h b/drivers/net/ethernet/cisco/enic/vnic_wq.h index 816f1ad6072f..296154351823 100644 --- a/drivers/net/ethernet/cisco/enic/vnic_wq.h +++ b/drivers/net/ethernet/cisco/enic/vnic_wq.h @@ -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 */ |