[netdrvr] sfc: Add phy_flash_cfg module parameter and implementation

The 10Xpress PHY supports flash upgrades through MDIO, but needs to be
put in upgrade mode at power-up.  This adds a module parameter and other
logic to support that.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/sfc/falcon_xmac.c b/drivers/net/sfc/falcon_xmac.c
index aa7521b24a5d..d99efe2e68b7 100644
--- a/drivers/net/sfc/falcon_xmac.c
+++ b/drivers/net/sfc/falcon_xmac.c
@@ -69,6 +69,10 @@ static int falcon_reset_xmac(struct efx_nic *efx)
                 udelay(10);
         }
 
+        /* This often fails when DSP is disabled, ignore it */
+        if (sfe4001_phy_flash_cfg != 0)
+                return 0;
+
         EFX_ERR(efx, "timed out waiting for XMAC core reset\n");
         return -ETIMEDOUT;
 }