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authorTimur Tabi <timur@codeaurora.org>2016-11-07 10:51:40 -0600
committerDavid S. Miller <davem@davemloft.net>2016-11-09 18:45:24 -0500
commit3e884493448131179a5b7cae1ddca1028ffaecc8 (patch)
treeed635993d7ff460c8e634a89f41ee7fd615607f3 /drivers/net/ethernet/qualcomm
parentcdb26d3387f0cdf7b2a2eea581385173547ef21f (diff)
net: qcom/emac: configure the external phy to allow pause frames
Pause frames are used to enable flow control. A MAC can send and receive pause frames in order to throttle traffic. However, the PHY must be configured to allow those frames to pass through. Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Timur Tabi <timur@codeaurora.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/qualcomm')
-rw-r--r--drivers/net/ethernet/qualcomm/emac/emac-mac.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.c b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
index 6fb3bee904d3..70a55dcc431d 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-mac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
@@ -1003,6 +1003,12 @@ int emac_mac_up(struct emac_adapter *adpt)
writel((u32)~DIS_INT, adpt->base + EMAC_INT_STATUS);
writel(adpt->irq.mask, adpt->base + EMAC_INT_MASK);
+ /* Enable pause frames. Without this feature, the EMAC has been shown
+ * to receive (and drop) frames with FCS errors at gigabit connections.
+ */
+ adpt->phydev->supported |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+ adpt->phydev->advertising |= SUPPORTED_Pause | SUPPORTED_Asym_Pause;
+
adpt->phydev->irq = PHY_IGNORE_INTERRUPT;
phy_start(adpt->phydev);