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authorGary Zambrano <zambrano@broadcom.com>2006-04-10 12:02:21 -0700
committerJeff Garzik <jeff@garzik.org>2006-04-12 18:04:03 -0400
commit2b474cf53870abf1bbad631c3368b9efc9b5ba9d (patch)
tree3dc14351bf455c345c463573c0cd7369e05f5631 /drivers/net/b44.c
parent4be5de25259de21894df5e2fecc30da8252dee8c (diff)
downloadblackbird-op-linux-2b474cf53870abf1bbad631c3368b9efc9b5ba9d.tar.gz
blackbird-op-linux-2b474cf53870abf1bbad631c3368b9efc9b5ba9d.zip
[PATCH] b44: disable default tx pause
Disable default tx pause frame support. The b44 controller has a bug that generates excessive tx pause frames. Signed-off-by: Gary Zambrano <zambrano@broadcom.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/b44.c')
-rw-r--r--drivers/net/b44.c31
1 files changed, 12 insertions, 19 deletions
diff --git a/drivers/net/b44.c b/drivers/net/b44.c
index c4e12b5cbb92..a67d537ccf49 100644
--- a/drivers/net/b44.c
+++ b/drivers/net/b44.c
@@ -410,25 +410,18 @@ static void __b44_set_flow_ctrl(struct b44 *bp, u32 pause_flags)
static void b44_set_flow_ctrl(struct b44 *bp, u32 local, u32 remote)
{
- u32 pause_enab = bp->flags & (B44_FLAG_TX_PAUSE |
- B44_FLAG_RX_PAUSE);
-
- if (local & ADVERTISE_PAUSE_CAP) {
- if (local & ADVERTISE_PAUSE_ASYM) {
- if (remote & LPA_PAUSE_CAP)
- pause_enab |= (B44_FLAG_TX_PAUSE |
- B44_FLAG_RX_PAUSE);
- else if (remote & LPA_PAUSE_ASYM)
- pause_enab |= B44_FLAG_RX_PAUSE;
- } else {
- if (remote & LPA_PAUSE_CAP)
- pause_enab |= (B44_FLAG_TX_PAUSE |
- B44_FLAG_RX_PAUSE);
- }
- } else if (local & ADVERTISE_PAUSE_ASYM) {
- if ((remote & LPA_PAUSE_CAP) &&
- (remote & LPA_PAUSE_ASYM))
- pause_enab |= B44_FLAG_TX_PAUSE;
+ u32 pause_enab = 0;
+
+ /* The driver supports only rx pause by default because
+ the b44 mac tx pause mechanism generates excessive
+ pause frames.
+ Use ethtool to turn on b44 tx pause if necessary.
+ */
+ if ((local & ADVERTISE_PAUSE_CAP) &&
+ (local & ADVERTISE_PAUSE_ASYM)){
+ if ((remote & LPA_PAUSE_ASYM) &&
+ !(remote & LPA_PAUSE_CAP))
+ pause_enab |= B44_FLAG_RX_PAUSE;
}
__b44_set_flow_ctrl(bp, pause_enab);
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