Hello Rob
On Tue, Apr 21, 2015 at 10:13 PM, Rob Herring <robherring2@xxxxxxxxx> wrote:
> On Tue, Apr 21, 2015 at 3:25 AM, Ricardo Ribalda Delgado
> <ricardo.ribalda@xxxxxxxxx> wrote:
>> of_platform_device_create_pdata() was using of_device_add() to create
>> the devices, but of_platform_device_destroy was using
>> of_platform_device_destroy().
>>
>> of_device_add(), do not call insert_resource(), which initializes the
>> parent field of the resource structure, needed by release_resource(),
>> called by of_platform_device_destroy().
>
> This is because some DTs have overlapping resources and doing this
> would break things. If you look at the git history, this was fixed and
> then reverted by Grant.
I cannot find that commit sorry, could you give me the hash or a link
to the mailing list?
ricardo@pilix:~/linux$ git shortlog drivers/of/platform.c | grep -i Revert
Revert "drivers: of: add initialization code for dma reserved memory"
To give a litte context to this patch, the issue started with this
conversaion with Bjorn:
https://lkml.org/lkml/2015/4/20/435
What we have today is also wrong, it leads to a null pointer deference
(and therefore a whole crash).
If we cannot use platform_device_add, then we cannot use
platform_device_destroy :)
Shall I prepare a patch replacing platform_device_destroy()?
Thanks!
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