diff mbox series

[v3,2/2] net: dp83822: disable rx error interrupt

Message ID 20220623134645.1858361-3-enguerrand.de-ribaucourt@savoirfairelinux.com (mailing list archive)
State Accepted
Commit 0e597e2affb90d6ea48df6890d882924acf71e19
Delegated to: Netdev Maintainers
Headers show
Series net: dp83822: fix interrupt floods | expand

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netdev/tree_selection success Guessed tree name to be net-next
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netdev/subject_prefix warning Target tree name not specified in the subject
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers fail 3 blamed authors not CCed: afd@ti.com f.fainelli@gmail.com dmurphy@ti.com; 6 maintainers not CCed: f.fainelli@gmail.com dmurphy@ti.com afd@ti.com pabeni@redhat.com kuba@kernel.org edumazet@google.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 9 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Enguerrand de Ribaucourt June 23, 2022, 1:46 p.m. UTC 
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@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Fixes: 87461f7a58ab ("net: phy: DP83822 initial driver submission")
---
 drivers/net/phy/dp83822.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
diff mbox series

Patch

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);