mirror of
https://github.com/Ysurac/openmptcprouter.git
synced 2025-02-15 04:42:02 +00:00
37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From e95d6f14d6ab15195125d2a08cbc7a659816ab05 Mon Sep 17 00:00:00 2001
|
|
From: Phil Elwell <phil@raspberrypi.com>
|
|
Date: Tue, 15 Dec 2020 16:38:37 +0000
|
|
Subject: [PATCH 338/634] net: lan78xx: Ack pending PHY ints when resetting
|
|
|
|
lan78xx_link_reset explicitly clears the MAC's view of the PHY's IRQ
|
|
status. In doing so it potentially leaves the PHY with a pending
|
|
interrupt that will never be acknowledged, at which point no further
|
|
interrupts will be generated.
|
|
|
|
Avoid the problem by acknowledging any pending PHY interrupt after
|
|
clearing the MAC's status bit.
|
|
|
|
See: https://github.com/raspberrypi/linux/issues/2937
|
|
|
|
Signed-off-by: Phil Elwell <phil@raspberrypi.com>
|
|
---
|
|
drivers/net/usb/lan78xx.c | 3 +++
|
|
1 file changed, 3 insertions(+)
|
|
|
|
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
|
|
index fdcf14aa4485..0c72686f1106 100644
|
|
--- a/drivers/net/usb/lan78xx.c
|
|
+++ b/drivers/net/usb/lan78xx.c
|
|
@@ -1272,6 +1272,9 @@ static int lan78xx_link_reset(struct lan78xx_net *dev)
|
|
if (unlikely(ret < 0))
|
|
return ret;
|
|
|
|
+ /* Acknowledge any pending PHY interrupt, lest it be the last */
|
|
+ phy_read(phydev, LAN88XX_INT_STS);
|
|
+
|
|
mutex_lock(&phydev->lock);
|
|
phy_read_status(phydev);
|
|
link = phydev->link;
|
|
--
|
|
2.33.1
|
|
|