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| author |   Tord Andersson <tord.andersson@endian.se> | 2011-08-03 22:11:47 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-08-04 02:04:32 -0700 |
| commit | d3e614577198757d5854caa912e88f2d4296479b (patch) | |
| tree | 82c78d2faf8aa426f77a5cc6d497122ed95f4161 /drivers/net | |
| parent | cdc_ncm: fix endianness problem. (diff) | |
| download | linux-dev-d3e614577198757d5854caa912e88f2d4296479b.tar.xz linux-dev-d3e614577198757d5854caa912e88f2d4296479b.zip | |
macb: restore wrap bit when performing underrun cleanup
When TX underrun occurs, a cleanup is performed that marks all buffers
as used. As a side effect it also clears the wrap bit in the last
buffer. This patch will restore the wrap bit.
Signed-off-by: Tord Andersson <tord.andersson@endian.se>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/macb.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/macb.c b/drivers/net/macb.c index 0fcdc25699d8..dc4e305a1087 100644 --- a/drivers/net/macb.c +++ b/drivers/net/macb.c @@ -322,6 +322,9 @@ static void macb_tx(struct macb *bp) for (i = 0; i < TX_RING_SIZE; i++) bp->tx_ring[i].ctrl = MACB_BIT(TX_USED); + /* Add wrap bit */ + bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP); + /* free transmit buffer in upper layer*/ for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) { struct ring_info *rp = &bp->tx_skb[tail]; |