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net: mvneta: fix use of state->speed

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[ Upstream commit f2ca673d2c ]

When support for short preambles was added, it incorrectly keyed its
decision off state->speed instead of state->interface.  state->speed
is not guaranteed to be correct for in-band modes, which can lead to
short preambles being unexpectedly disabled.

Fix this by keying off the interface mode, which is the only way that
mvneta can operate at 2.5Gbps.

Fixes: da58a931f2 ("net: mvneta: Add support for 2500Mbps SGMII")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Russell King
2020-06-30 11:04:40 +01:00
committed by Greg Kroah-Hartman
parent 4f412ae89e
commit 92002d59ec
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/marvell/mvneta.c
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@@ -3594,7 +3594,7 @@ static void mvneta_mac_config(struct phylink_config *config, unsigned int mode,
/* When at 2.5G, the link partner can send frames with shortened
* preambles.
*/
if (state->speed == SPEED_2500)
if (state->interface == PHY_INTERFACE_MODE_2500BASEX)
new_ctrl4 |= MVNETA_GMAC4_SHORT_PREAMBLE_ENABLE;
if (pp->phy_interface != state->interface) {