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

From: Enguerrand de Ribaucourt
Date: Thu Jun 23 2022 - 09:15:39 EST


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@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Fixes: 87461f7a58ab694e638ac52afa543b427751a9d0
---
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