[net-next-2.6 PATCH 2/4] ixgbe: Disable Flow Control for certain devices
From: Jeff Kirsher <hidden>
Date: 2009-11-25 04:51:40
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: PJ Waskiewicz <redacted> Flow Control autoneg should be disabled for certain adapters that don't support autonegotiation of Flow Control at 10 gigabit. These interfaces are the 10GBASE-T devices, CX4, and SFP+, all running at 10 gigabit only. 1 gigabit is fine. Signed-off-by: Peter P Waskiewicz Jr <redacted> Signed-off-by: Jeff Kirsher <redacted> --- drivers/net/ixgbe/ixgbe_common.c | 14 ++++++++++++++ 1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c
index 40ff120..f42a954 100644
--- a/drivers/net/ixgbe/ixgbe_common.c
+++ b/drivers/net/ixgbe/ixgbe_common.c@@ -1784,6 +1784,20 @@ s32 ixgbe_fc_autoneg(struct ixgbe_hw *hw) } /* + * Bail out on + * - copper or CX4 adapters + * - fiber adapters running at 10gig + */ + if ((hw->phy.media_type == ixgbe_media_type_copper) || + (hw->phy.media_type == ixgbe_media_type_cx4) || + ((hw->phy.media_type == ixgbe_media_type_fiber) && + (speed == IXGBE_LINK_SPEED_10GB_FULL))) { + hw->fc.fc_was_autonegged = false; + hw->fc.current_mode = hw->fc.requested_mode; + goto out; + } + + /* * Read the AN advertisement and LP ability registers and resolve * local flow control settings accordingly */