aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@g5.osdl.org>2006-05-24 08:36:03 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-05-24 08:36:03 -0700
commitb8bba261e05bce1712231060f296001ddf8250ab (patch)
treee7d6ae6e4f3c7fe48d3cbc5dfb83abb5826dfb9a
parent51c403274093767d6dc30703d67e9f0b255c7439 (diff)
parenta1433ac4ab46fb23ae77804c207a1f710a7b12f1 (diff)
downloadlinux-2.6.38-lt-ux500-b8bba261e05bce1712231060f296001ddf8250ab.tar.gz
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.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/net/sky2.c b/drivers/net/sky2.c
index 60779ebf2ff..959109609d8 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);