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Commit 47c3d19f authored by Steve Hodgson's avatar Steve Hodgson Committed by David S. Miller
Browse files

sfc: QT202x: Reset before reading PHY id 



Reading standard registers on the QT2025C before its firmware has
booted may cause the boot process to fail.  Therefore, follow the
recommended reset sequence before reading its id registers.  Either
order works for the QT2022C2, so don't differentiate.

Signed-off-by: default avatarBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fdaa9aed

drivers/net/sfc/qt202x_phy.c

+8 −14
Original line number Diff line number Diff line
@@ -138,33 +138,27 @@ static int qt202x_reset_phy(struct efx_nic *efx) 
static int qt202x_phy_init(struct efx_nic *efx)

{

	struct qt202x_phy_data *phy_data;

	u32 devid = efx_mdio_read_id(efx, MDIO_MMD_PHYXS);

	u32 devid;

	int rc;



	rc = qt202x_reset_phy(efx);

	if (rc) {

		EFX_ERR(efx, "PHY init failed\n");

		return rc;

	}



	phy_data = kzalloc(sizeof(struct qt202x_phy_data), GFP_KERNEL);

	if (!phy_data)

		return -ENOMEM;

	efx->phy_data = phy_data;



	devid = efx_mdio_read_id(efx, MDIO_MMD_PHYXS);

	EFX_INFO(efx, "PHY ID reg %x (OUI %06x model %02x revision %x)\n",

		 devid, efx_mdio_id_oui(devid), efx_mdio_id_model(devid),

		 efx_mdio_id_rev(devid));



	phy_data->phy_mode = efx->phy_mode;



	rc = qt202x_reset_phy(efx);



	EFX_INFO(efx, "PHY init %s.\n",

		 rc ? "failed" : "successful");

	if (rc < 0)

		goto fail;



	return 0;



 fail:

	kfree(efx->phy_data);

	efx->phy_data = NULL;

	return rc;

}



static int qt202x_link_ok(struct efx_nic *efx)