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| author |   Florian Fainelli <f.fainelli@gmail.com> | 2022-08-24 19:39:51 -0700 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2022-08-26 18:48:15 -0700 |
| commit | 3ce9f2bef75528936c78a7053301f5725f622f3a (patch) | |
| tree | cb6a9b5850054d5b2721fbfc355abd5a2bdf696d /drivers/net/ethernet | |
| parent | tg3: Disable tg3 device on system reboot to avoid triggering AER (diff) | |
| download | linux-dev-3ce9f2bef75528936c78a7053301f5725f622f3a.tar.xz linux-dev-3ce9f2bef75528936c78a7053301f5725f622f3a.zip | |
net: smsc911x: Stop and start PHY during suspend and resume
Commit 744d23c71af3 ("net: phy: Warn about incorrect
mdio_bus_phy_resume() state") unveiled that the smsc911x driver was not
properly stopping and restarting the PHY during suspend/resume. Correct
that by indicating that the MAC is in charge of PHY PM operations and
ensure that all MDIO bus activity is quiescent during suspend.
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Fixes: fba863b81604 ("net: phy: make PHY PM ops a no-op if MAC driver manages PHY PM")
Fixes: 2aa70f864955 ("net: smsc911x: Quieten netif during suspend")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220825023951.3220-1-f.fainelli@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/smsc/smsc911x.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/smsc/smsc911x.c b/drivers/net/ethernet/smsc/smsc911x.c index 3bf20211cceb..3829c2805b16 100644 --- a/drivers/net/ethernet/smsc/smsc911x.c +++ b/drivers/net/ethernet/smsc/smsc911x.c @@ -1037,6 +1037,8 @@ static int smsc911x_mii_probe(struct net_device *dev) return ret; } + /* Indicate that the MAC is responsible for managing PHY PM */ + phydev->mac_managed_pm = true; phy_attached_info(phydev); phy_set_max_speed(phydev, SPEED_100); @@ -2587,6 +2589,8 @@ static int smsc911x_suspend(struct device *dev) if (netif_running(ndev)) { netif_stop_queue(ndev); netif_device_detach(ndev); + if (!device_may_wakeup(dev)) + phy_stop(ndev->phydev); } /* enable wake on LAN, energy detection and the external PME @@ -2628,6 +2632,8 @@ static int smsc911x_resume(struct device *dev) if (netif_running(ndev)) { netif_device_attach(ndev); netif_start_queue(ndev); + if (!device_may_wakeup(dev)) + phy_start(ndev->phydev); } return 0; |