From: Antoine Tenart Date: Thu, 25 Jun 2020 15:42:09 +0000 (+0200) Subject: net: phy: mscc: restore the base page in vsc8514/8584_config_init X-Git-Tag: x86-urgent-2020-08-15~21^2~417^2~2 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=6119dda34e5d0821959e37641b287576826b6378;p=users%2Fdwmw2%2Flinux.git net: phy: mscc: restore the base page in vsc8514/8584_config_init In the vsc8584_config_init and vsc8514_config_init, the base page is set to 'GPIO', configuration is done, and the page is never explicitly restored to the standard page. No bug was triggered as it turns out helpers called in those config_init functions do modify the base page, and set it back to standard. But that is dangerous and any modification to those functions would introduce bugs. This patch fixes this, to improve maintenance, by restoring the base page to 'standard' once 'GPIO' accesses are completed. Signed-off-by: Antoine Tenart Signed-off-by: David S. Miller --- diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c index 03680933f5300..f625109df00a5 100644 --- a/drivers/net/phy/mscc/mscc_main.c +++ b/drivers/net/phy/mscc/mscc_main.c @@ -1395,6 +1395,11 @@ static int vsc8584_config_init(struct phy_device *phydev) if (ret) goto err; + ret = phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS, + MSCC_PHY_PAGE_STANDARD); + if (ret) + goto err; + if (!phy_interface_is_rgmii(phydev)) { val = PROC_CMD_MCB_ACCESS_MAC_CONF | PROC_CMD_RST_CONF_PORT | PROC_CMD_READ_MOD_WRITE_PORT; @@ -1779,7 +1784,11 @@ static int vsc8514_config_init(struct phy_device *phydev) val &= ~MAC_CFG_MASK; val |= MAC_CFG_QSGMII; ret = phy_base_write(phydev, MSCC_PHY_MAC_CFG_FASTLINK, val); + if (ret) + goto err; + ret = phy_base_write(phydev, MSCC_EXT_PAGE_ACCESS, + MSCC_PHY_PAGE_STANDARD); if (ret) goto err;