The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 0e597e2affb90d6ea48df6890d882924acf71e19 Mon Sep 17 00:00:00 2001
From: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@xxxxxxxxxxxxxxxxxxxx>
Date: Thu, 23 Jun 2022 15:46:45 +0200
Subject: [PATCH] net: dp83822: disable rx error interrupt
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>
diff --git a/drivers/net/phy/dp83822.c b/drivers/net/phy/dp83822.c
index 95ef507053a6..8549e0e356c9 100644
--- a/drivers/net/phy/dp83822.c
+++ b/drivers/net/phy/dp83822.c
@@ -229,8 +229,7 @@ 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_LINK_STAT_INT_EN |
+ misr_status |= (DP83822_LINK_STAT_INT_EN |
DP83822_ENERGY_DET_INT_EN |
DP83822_LINK_QUAL_INT_EN);
