linux-kernel - Re: i2c-designware: NULL ptr at RIP: 0010:regmap

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Date: Tue, 9 Jan 2024 12:11:46 +0200
From: Jarkko Nikula <jarkko.nikula@...ux.intel.com>
To: "V, Narasimhan" <Narasimhan.V@....com>, Borislav Petkov <bp@...en8.de>,
 "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>
Cc: lkml <linux-kernel@...r.kernel.org>,
 Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
 Mika Westerberg <mika.westerberg@...ux.intel.com>,
 Jan Dabros <jsd@...ihalf.com>, Andi Shyti <andi.shyti@...nel.org>,
 "Limonciello, Mario" <Mario.Limonciello@....com>
Subject: Re: i2c-designware: NULL ptr at RIP: 0010:regmap_read+0x12/0x70

Hi

On 1/9/24 09:56, V, Narasimhan wrote:
>   * Looks like the issue is with this below commit:
>   * i2c: designware: Fix lock probe call order in dw_i2c_plat_probe()
> 
Hmm... This makes me even more confused since your device AMDI0010 
should not even use the access semaphore.

So linux-next works if you run a commit before it or revert these three 
patches? (commit 2f571a725434 ("i2c: designware: Fix lock probe call 
order in dw_i2c_plat_probe()") doesn't revert without reverting two 
other related commits after it)

git show f9b51f600217b38f46ea39d6aa445e594bf3eb30 |patch -p1 -R
git show b8034c7d28a988be82efbf4d65faa847334811f7 |patch -p1 -R
git show 2f571a72543463ef07dc3ac61e7b703b9ad997f9 |patch -p1 -R