Re: [PATCH v2] ACPI: NFIT: Fix local use of devm_*()

["Wilczynski, Michal" <michal.wilczynski@intel.com>]

On 10/13/2023 7:05 PM, Dan Williams wrote:
> Wilczynski, Michal wrote:
>> On 10/13/2023 6:38 PM, Dan Williams wrote:
>>> Michal Wilczynski wrote:
>>>> devm_*() family of functions purpose is managing memory attached to a
>>>> device. So in general it should only be used for allocations that should
>>>> last for the whole lifecycle of the device. 
>>> No, this assertion is not accurate, if it were strictly true then
>>> devm_kfree() should be deleted. This patch is only a cleanup to switch
>>> the automatic cleanup pattern from devm to the new cleanup.h helpers.
>> The memory in question is only used locally in a function, so there is no reason
>> to use devm_*() family of functions. I think devm_kfree() is more for special
>> cases where the memory is meant to be used for the whole lifecycle of device,
>> but some special case occurs and it's not and it needs to be freed.
>>
>> This is an incorrect API usage. Would you propose to change all memory
>> allocations currently being done to devm_*() family simply because devm_kfree()
>> exists ?
> Michal, please work with someone else to get these cleanups upstream, I
> am done with this thread.

I'm really sorry if I offended you, I didn't mean to.

Michał