4.14-stable review patch. If anyone has any objections, please let me know.
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From: Sudarsana Reddy Kalluru sudarsana.kalluru@cavium.com
[ Upstream commit 4ad95a93a702ec4f4fb5159b822797ba67b8cbbe ]
Apparently, MFW publishes EEE capabilities even for Fiber-boards that don't support them, and later since qed internally sets adv_caps it would cause link-flap avoidance (LFA) to fail when driver would initiate the link. This in turn delays the link, causing traffic to fail.
Driver has been modified to not to ask MFW for any EEE config if EEE isn't to be enabled.
Fixes: 645874e5 ("qed: Add support for Energy efficient ethernet.") Signed-off-by: Sudarsana Reddy Kalluru Sudarsana.Kalluru@cavium.com Signed-off-by: Ariel Elior ariel.elior@cavium.com Signed-off-by: Michal Kalderon Michal.Kalderon@cavium.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/ethernet/qlogic/qed/qed_mcp.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-)
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.c +++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.c @@ -1279,9 +1279,15 @@ int qed_mcp_set_link(struct qed_hwfn *p_ phy_cfg.pause |= (params->pause.forced_tx) ? ETH_PAUSE_TX : 0; phy_cfg.adv_speed = params->speed.advertised_speeds; phy_cfg.loopback_mode = params->loopback_mode; - if (p_hwfn->mcp_info->capabilities & FW_MB_PARAM_FEATURE_SUPPORT_EEE) { - if (params->eee.enable) - phy_cfg.eee_cfg |= EEE_CFG_EEE_ENABLED; + + /* There are MFWs that share this capability regardless of whether + * this is feasible or not. And given that at the very least adv_caps + * would be set internally by qed, we want to make sure LFA would + * still work. + */ + if ((p_hwfn->mcp_info->capabilities & + FW_MB_PARAM_FEATURE_SUPPORT_EEE) && params->eee.enable) { + phy_cfg.eee_cfg |= EEE_CFG_EEE_ENABLED; if (params->eee.tx_lpi_enable) phy_cfg.eee_cfg |= EEE_CFG_TX_LPI; if (params->eee.adv_caps & QED_EEE_1G_ADV)