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From: Greg KH <greg@kroah.com>
To: Primoz Beltram <primoz.beltram@kate.si>
Cc: kernelnewbies@kernelnewbies.org
Subject: Re: Update: I2C bus driver TIMEDOUT because of PM autosuspend
Date: Thu, 28 Nov 2019 11:37:12 +0100
Message-ID: <20191128103712.GA3400429@kroah.com> (raw)
In-Reply-To: <7e195624-1bae-194a-a9e9-4f71b1af4abc@kate.si>

On Thu, Nov 28, 2019 at 10:32:42AM +0100, Primoz Beltram wrote:
> I must update my report. It is not PM autosuspend (void calls do nothing, no
> miracle here).
> 
> This morning I reproduced the I2C timeout error also with
> XIIC_PM_TIMEOUT=10000 delay. For several days some other change was
> misleading me to PM autosuspend conclusion.
> 
> What looks to me now is that just slight change in driver code (e.g. add or
> remove dev_info() call) changes the execution timing pattern of driver and
> this then determine if the problem probability window is hit or not.
> Probability to hit the problem is very low.
> 
> The driver timeout error and its result to I2C bus blocked is still a
> problem.
> 
> I would still like to let the maintainer aware of this problem.

Then email them, and not some other random mailing list :)

good luck!

greg k-h

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Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-28  9:32 Primoz Beltram
2019-11-28 10:37 ` Greg KH [this message]

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