Messages in this thread Patch in this message | | | From | Tord Andersson <> | Subject | [PATCH] macb: restore wrap bit when performing underrun cleanup | Date | Thu, 4 Aug 2011 10:11:47 +0200 |
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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> --- 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 0fcdc25..dc4e305 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]; -- 1.5.4.3
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