linux-kernel - Re: [PATCH 0/2] Add framework for user controlled driver probes

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Message-ID: <43447165-37f9-4b35-ace6-8d32760f75a8@kernel.org>
Date: Thu, 26 Sep 2024 14:34:26 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Nayeemahmed Badebade <nayeemahmed.badebade@...y.com>,
 Greg KH <gregkh@...uxfoundation.org>
Cc: robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
 rafael@...nel.org, yoshihiro.toyama@...y.com, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org
Subject: Re: [PATCH 0/2] Add framework for user controlled driver probes

On 26/09/2024 13:07, Nayeemahmed Badebade wrote:
>>
>>>> not required at the time of booting.
>>>> Example: drivers/pci/controller/dwc/pci-imx6.c
>>
>> Just this one?  I don't see anything obvious that can't turn that into a
>> module, have you tried?  What went wrong?
>>
> 
> Yes we have tried building it as a module.
> This driver currently registers abort handler for pci using function
> hook_fault_code() on arm. This function is not exported and marked with __init
> tag. So we can't use it post boot.

Then this is something to fix.

> Also from past attempt made to modularize this driver in community, we saw the
> hook is not safe to be used post boot.
> Reference:
>  https://lore.kernel.org/linux-arm-kernel/1454889644-27830-2-git-send-email-paul.gortmaker@windriver.com/T/#m8995c6dcc40c54baef0665a7ee16d4209cb59655


Best regards,
Krzysztof