[PATCH net-next 07/11] bnxt_en: avoid link reset if speed is not changed
From: Michael Chan <michael.chan@broadcom.com>
Date: 2020-09-27 17:43:04
Subsystem:
broadcom bnxt_en 50 gigabit ethernet driver, networking drivers, the rest · Maintainers:
Michael Chan, Pavan Chebbi, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Edwin Peer <redacted> PORT_PHY_CONFIG is always sent with REQ_FLAGS_RESET_PHY set. This flag must be set in order for the firmware to institute the requested PHY change immediately, but it results in a link flap. This is unnecessary and results in an improved user experience if the PHY reconfiguration is avoided when the user requested speed does not constitute a change. Signed-off-by: Edwin Peer <redacted> Signed-off-by: Michael Chan <michael.chan@broadcom.com> --- drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 2cb2495c2351..4fdb672a47a0 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c@@ -1736,6 +1736,11 @@ static int bnxt_force_link_speed(struct net_device *dev, u32 ethtool_speed) return -EINVAL; } + if (link_info->req_link_speed == fw_speed && + link_info->req_signal_mode == sig_mode && + link_info->autoneg == 0) + return -EALREADY; + link_info->req_link_speed = fw_speed; link_info->req_signal_mode = sig_mode; link_info->req_duplex = BNXT_LINK_DUPLEX_FULL;
@@ -1816,8 +1821,11 @@ static int bnxt_set_link_ksettings(struct net_device *dev, } speed = base->speed; rc = bnxt_force_link_speed(dev, speed); - if (rc) + if (rc) { + if (rc == -EALREADY) + rc = 0; goto set_setting_exit; + } } if (netif_running(dev))
--
2.18.1
Attachments
- smime.p7s [application/pkcs7-signature] 4166 bytes