netdev - [PATCH v2 2/2] net: dp83822: disable rx error interrupt

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Date:   Thu, 23 Jun 2022 15:06:54 +0200
From:   Enguerrand de Ribaucourt 
        <enguerrand.de-ribaucourt@...oirfairelinux.com>
To:     andrew@...n.ch
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux@...linux.org.uk,
        hkallweit1@...il.com,
        Enguerrand de Ribaucourt 
        <enguerrand.de-ribaucourt@...oirfairelinux.com>
Subject: [PATCH v2 2/2] 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.

Signed-off-by: Enguerrand de Ribaucourt <enguerrand.de-ribaucourt@...oirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@...n.ch>
---
 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 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);

--
2.25.1