From: Heiner Kallweit Date: Wed, 9 Mar 2022 21:04:47 +0000 (+0100) Subject: net: phy: meson-gxl: improve link-up behavior X-Git-Tag: v6.1-rc5~1867^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=2c87c6f9fbddc5b84d67b2fa3f432fcac6d99d93;p=platform%2Fkernel%2Flinux-starfive.git net: phy: meson-gxl: improve link-up behavior Sometimes the link comes up but no data flows. This patch fixes this behavior. It's not clear what's the root cause of the issue. According to the tests one other link-up issue remains. In very rare cases the link isn't even reported as up. Fixes: 84c8f773d2dc ("net: phy: meson-gxl: remove the use of .ack_callback()") Tested-by: Erico Nunes Signed-off-by: Heiner Kallweit Link: https://lore.kernel.org/r/e3473452-a1f9-efcf-5fdd-02b6f44c3fcd@gmail.com Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/phy/meson-gxl.c b/drivers/net/phy/meson-gxl.c index c49062a..73f7962 100644 --- a/drivers/net/phy/meson-gxl.c +++ b/drivers/net/phy/meson-gxl.c @@ -243,7 +243,13 @@ static irqreturn_t meson_gxl_handle_interrupt(struct phy_device *phydev) irq_status == INTSRC_ENERGY_DETECT) return IRQ_HANDLED; - phy_trigger_machine(phydev); + /* Give PHY some time before MAC starts sending data. This works + * around an issue where network doesn't come up properly. + */ + if (!(irq_status & INTSRC_LINK_DOWN)) + phy_queue_state_machine(phydev, msecs_to_jiffies(100)); + else + phy_trigger_machine(phydev); return IRQ_HANDLED; }