Some RX errors, notably when disconnecting the cable, increase the RCSR
register. Once half full (0x7fff), an interrupt flood is generated. I
measured ~3k/s interrupts even after the RX errors transfer was
stopped.
Since we don't read and clear the RCSR register, we should disable this
interrupt.
Fixes: 87461f7a58ab ("net: phy: DP83822 initial driver submission")
Signed-off-by: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
[backport of 5.10 commit 0e597e2affb90d6ea48df6890d882924acf71e19]
---
drivers/net/phy/dp83822.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c
index cc1522550f2c..da3983352dd4 100644
--- a/drivers/net/phy/dp83822.c
+++ b/drivers/net/phy/dp83822.c
@@ -197,8 +197,7 @@ static int dp83822_config_intr(struct phy_device *phydev)
if (misr_status < 0)
return misr_status;
- misr_status |= (DP83822_RX_ERR_HF_INT_EN |
- DP83822_ANEG_COMPLETE_INT_EN |
+ misr_status |= (DP83822_ANEG_COMPLETE_INT_EN |
DP83822_DUP_MODE_CHANGE_INT_EN |
DP83822_SPEED_CHANGED_INT_EN |
DP83822_LINK_STAT_INT_EN |
--
2.25.1
