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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Aaro Koskinen <aaro.koskinen@iki.fi>,
        "David S. Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.14 103/172] smsc95xx: fix stalled rx after link change
Date:   Mon,  4 Oct 2021 14:52:33 +0200
Message-Id: <20211004125048.309479236@linuxfoundation.org>
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From: Aaro Koskinen <aaro.koskinen@iki.fi>

[ Upstream commit 5ab8a447bcfee1ded709e7ff5dc7608ca9f66ae2 ]

After commit 05b35e7eb9a1 ("smsc95xx: add phylib support"), link changes
are no longer propagated to usbnet. As a result, rx URB allocation won't
happen until there is a packet sent out first (this might never happen,
e.g. running just ssh server with a static IP). Fix by triggering usbnet
EVENT_LINK_CHANGE.

Fixes: 05b35e7eb9a1 ("smsc95xx: add phylib support")
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/usb/smsc95xx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 4c8ee1cff4d4..4cb71dd1998c 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1178,7 +1178,10 @@ static void smsc95xx_unbind(struct usbnet *dev, struct usb_interface *intf)
 
 static void smsc95xx_handle_link_change(struct net_device *net)
 {
+	struct usbnet *dev = netdev_priv(net);
+
 	phy_print_status(net->phydev);
+	usbnet_defer_kevent(dev, EVENT_LINK_CHANGE);
 }
 
 static int smsc95xx_start_phy(struct usbnet *dev)
-- 
2.33.0