Subject: [PATCH 2/2] [v2] net: qcom/emac: enable flow control if requested

From: Timur Tabi <[email-masked]>
Date: Mon, 7 Nov 2016 10:51:41 -0600

If the PHY has been configured to allow pause frames, then the MAC
should be configured to generate and/or accept those frames.

Signed-off-by: Timur Tabi <[email-masked]>
---

v2: fix calculation when TXFC should be set

 drivers/net/ethernet/qualcomm/emac/emac-mac.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/qualcomm/emac/emac-mac.c b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
index 70a55dc..0b4deb3 100644
--- a/drivers/net/ethernet/qualcomm/emac/emac-mac.c
+++ b/drivers/net/ethernet/qualcomm/emac/emac-mac.c
@@ -575,10 +575,11 @@ void emac_mac_start(struct emac_adapter *adpt)
 
 	mac |= TXEN | RXEN;     /* enable RX/TX */
 
-	/* We don't have ethtool support yet, so force flow-control mode
-	 * to 'full' always.
-	 */
-	mac |= TXFC | RXFC;
+	/* Configure MAC flow control to match the PHY's settings. */
+	if (phydev->pause)
+		mac |= RXFC;
+	if (phydev->pause != phydev->asym_pause)
+		mac |= TXFC;
 
 	/* setup link speed */
 	mac &= ~SPEED_MASK;
-- 
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