linux-kernel - [PATCH 5.15 43/98] net: asix: fix "cant send until first packet is send" issue

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Date:   Tue,  5 Jul 2022 13:58:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Anton Lundin <glance@....umu.se>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH 5.15 43/98] net: asix: fix "cant send until first packet is send" issue

From: Oleksij Rempel <o.rempel@...gutronix.de>

commit 805206e66fab4ba1e0ebd19402006d62cd1d4902 upstream.

If cable is attached after probe sequence, the usbnet framework would
not automatically start processing RX packets except at least one
packet was transmitted.

On systems with any kind of address auto configuration this issue was
not detected, because some packets are send immediately after link state
is changed to "running".

With this patch we will notify usbnet about link status change provided by the
PHYlib.

Fixes: e532a096be0e ("net: usb: asix: ax88772: add phylib support")
Reported-by: Anton Lundin <glance@....umu.se>
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
Tested-by: Anton Lundin <glance@....umu.se>
Link: https://lore.kernel.org/r/20220624075139.3139300-1-o.rempel@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/usb/asix_common.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -431,6 +431,7 @@ void asix_adjust_link(struct net_device
 
 	asix_write_medium_mode(dev, mode, 0);
 	phy_print_status(phydev);
+	usbnet_link_change(dev, phydev->link, 0);
 }
 
 int asix_write_gpio(struct usbnet *dev, u16 value, int sleep, int in_pm)