sfc: SFT9001: Fix speed reporting in 1G PHY loopback

Instead of disabling AN in loopback, just prevent restarting AN and
override the speed in sft9001_get_settings().

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/sfc/mdio_10g.c b/drivers/net/sfc/mdio_10g.c
index f6a16428113d..7f09ab581945 100644
--- a/drivers/net/sfc/mdio_10g.c
+++ b/drivers/net/sfc/mdio_10g.c
@@ -15,6 +15,7 @@
 #include "net_driver.h"
 #include "mdio_10g.h"
 #include "boards.h"
+#include "workarounds.h"
 
 int mdio_clause45_reset_mmd(struct efx_nic *port, int mmd,
                             int spins, int spintime)
@@ -517,6 +518,9 @@ int mdio_clause45_set_settings(struct efx_nic *efx,
                         reg |= BMCR_ANENABLE | BMCR_ANRESTART;
                 else
                         reg &= ~BMCR_ANENABLE;
+                if (EFX_WORKAROUND_15195(efx)
+                    && LOOPBACK_MASK(efx) & efx->phy_op->loopbacks)
+                        reg &= ~BMCR_ANRESTART;
                 if (xnp)
                         reg |= 1 << MDIO_AN_CTRL_XNP_LBN;
                 else