linux-kernel - Re: [Regression] dmesg warnings after "i2c: smbus: Support up to 8 SPD EEPROMs"

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Message-ID: <20240501072744.2xm4v3idjjsehwkq@ninjato>
Date: Wed, 1 May 2024 09:27:44 +0200
From: Wolfram Sang <wsa+renesas@...g-engineering.com>
To: Mateusz Jończyk <mat.jonczyk@...pl>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Jean Delvare <jdelvare@...e.de>, linux-kernel@...r.kernel.org,
	linux-i2c@...r.kernel.org, ruirui.yang@...ux.dev,
	Wolfram Sang <wsa@...nel.org>
Subject: Re: [Regression] dmesg warnings after "i2c: smbus: Support up to 8
 SPD EEPROMs"


Adding Heiner...

On Tue, Apr 30, 2024 at 09:39:03PM +0200, Mateusz Jończyk wrote:
> Hello,
> 
> I have received a regression report on
> commit 13e3a512a29001c ("i2c: smbus: Support up to 8 SPD EEPROMs")
> as I was subscribed to some kernel Bugzilla thread and I'm posting it here
> to make you aware of it.
> 
> This thread was
> 
> Bug 213345 - i801_smbus: Timeout waiting for interrupt, driver can't access SMBus 
> 
> ruirui.yang@...ux.dev on 2024-04-19 08:22:57 UTC wrote:
> > I got similar issue on thinkpad X1 gen9 with latest 6.9.0-rc4+
> > Git bisect the first bad commit is "13e3a512a29001c  i2c: smbus: Support up to 8 SPD EEPROMs
> > "
> > 
> > modprobe without param:
> > [ 1290.401393] i801_smbus 0000:00:1f.4: SPD Write Disable is set
> > [ 1290.401486] i801_smbus 0000:00:1f.4: SMBus using PCI interrupt
> > [ 1290.403340] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1290.403383] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1290.403410] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1290.403437] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1290.403465] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1290.403492] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1290.403519] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1290.403546] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > 
> > with param 
> > [ 1314.568785] i801_smbus 0000:00:1f.4: Interrupt disabled by user
> > [ 1314.568837] i801_smbus 0000:00:1f.4: SPD Write Disable is set
> > [ 1314.568894] i801_smbus 0000:00:1f.4: SMBus using po*lling
> > [ 1314.570230] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1314.570257] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1314.570283] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1314.570310] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1314.570336] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1314.570362] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1314.570389] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> > [ 1314.570415] i801_smbus 0000:00:1f.4: SMBus is busy, can't use it!
> 
> Link: https://bugzilla.kernel.org/show_bug.cgi?id=213345
> 
> The param mentioned was i2c-i801.disable_features=0x10, which disables interrupt usage
> of this driver.
> 
> Please decide if this is serious enough to warrant a revert.
> 
> Greetings,
> Mateusz
> 
> 

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