regression: Null pointer exception on resume from S3 with i2c DesignWare driver

* regression: Null pointer exception on resume from S3 with i2c DesignWare driver
@ 2022-05-05  9:52 Thorsten Leemhuis
  2022-05-06  8:44 ` Jarkko Nikula
  0 siblings, 1 reply; 2+ messages in thread
From: Thorsten Leemhuis @ 2022-05-05  9:52 UTC (permalink / raw)
  To: Jarkko Nikula; +Cc: Samuel Clark, linux-i2c, regressions, LKML

Hi, this is your Linux kernel regression tracker.

I noticed a regression report in bugzilla.kernel.org that afaics nobody
acted upon since it was reported about a week ago, that's why I decided
to forward it to the lists and all people that seemed to be relevant. To
quote from https://bugzilla.kernel.org/show_bug.cgi?id=215907 :

> Running Manjaro on a Gigabyte B660M DS3H DDR4 with custom 5.17 kernel. Confirmed on other distributions and kernels back to 5.12; issue is not present on most recent 5.11 kernel. dmesg traceback points to i2c DesignWare driver, specifically drivers/i2c/busses/i2c-designware-master.c:369. It seems the msgs struct passed in to i2c_dw_xfer_msg is null.
> 
> Similar issue seems to be reported here:  https://lore.kernel.org/lkml/YY5BRrE8bLyvd3PB@smile.fi.intel.com/t/  
> 
> lspci output: https://pastebin.com/MwFM2VBJ
> dmesg from crashed kernel: https://pastebin.com/t6GsHjkq
> kernel config: https://pastebin.com/awrSve5u

Could somebody take a look into this? Or was this discussed somewhere
else already? Or even fixed?

Anyway, to get this tracked:

#regzbot introduced: v5.11..v5.12
#regzbot from: Samuel Clark <slc2015@gmail.com>
#regzbot title: i2c: designware: Null pointer exception on resume from S3
#regzbot link: https://bugzilla.kernel.org/show_bug.cgi?id=215907

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I deal with a lot of
reports and sometimes miss something important when writing mails like
this. If that's the case here, don't hesitate to tell me in a public
reply, it's in everyone's interest to set the public record straight.

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