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@vger.kernel.org.
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@savoirfairelinux.com 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@savoirfairelinux.com Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: Jakub Kicinski kuba@kernel.org
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);