diff options
| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-05-24 08:36:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-05-24 08:36:03 -0700 |
| commit | b8bba261e05bce1712231060f296001ddf8250ab (patch) | |
| tree | e7d6ae6e4f3c7fe48d3cbc5dfb83abb5826dfb9a | |
| parent | 51c403274093767d6dc30703d67e9f0b255c7439 (diff) | |
| parent | a1433ac4ab46fb23ae77804c207a1f710a7b12f1 (diff) | |
Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
[PATCH] sky2: fix jumbo packet support
| -rw-r--r-- | drivers/net/sky2.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c index 60779ebf2ff6..959109609d85 100644 --- a/drivers/net/sky2.c +++ b/drivers/net/sky2.c @@ -979,6 +979,7 @@ static int sky2_rx_start(struct sky2_port *sky2) struct sky2_hw *hw = sky2->hw; unsigned rxq = rxqaddr[sky2->port]; int i; + unsigned thresh; sky2->rx_put = sky2->rx_next = 0; sky2_qset(hw, rxq); @@ -1003,9 +1004,21 @@ static int sky2_rx_start(struct sky2_port *sky2) sky2_rx_add(sky2, re->mapaddr); } - /* Truncate oversize frames */ - sky2_write16(hw, SK_REG(sky2->port, RX_GMF_TR_THR), sky2->rx_bufsize - 8); - sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_ON); + + /* + * The receiver hangs if it receives frames larger than the + * packet buffer. As a workaround, truncate oversize frames, but + * the register is limited to 9 bits, so if you do frames > 2052 + * you better get the MTU right! + */ + thresh = (sky2->rx_bufsize - 8) / sizeof(u32); + if (thresh > 0x1ff) + sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_OFF); + else { + sky2_write16(hw, SK_REG(sky2->port, RX_GMF_TR_THR), thresh); + sky2_write32(hw, SK_REG(sky2->port, RX_GMF_CTRL_T), RX_TRUNC_ON); + } + /* Tell chip about available buffers */ sky2_write16(hw, Y2_QADDR(rxq, PREF_UNIT_PUT_IDX), sky2->rx_put); |