Re: [PATCH] acpi: scan: Fix a possible data race in acpi_scan_hotplug_enabled

[Jia-Ju Bai]

On 2018/5/9 4:17, Rafael J. Wysocki wrote:
> On Tue, May 8, 2018 at 5:08 AM, Jia-Ju Bai <baijiaju1990@xxxxxxxxx> wrote:
> > The write operation to "hotplug->enabled" is protected by
> > the lock on line 1760, but the read operation to
> > this data on line 1755 is not protected by the lock.
> > Thus, there may exist a data race for "hotplug->enabled".
> Either it does exist, or it doesn't.
>
> If it exists, it needs to be fixed.  If it doesn't exist, nothing
> needs to be done.
>
> Which is the case?

I only read the code and find this possible data race.
It is not found in real driver execution.
I am not sure of it, so I use "may" and "possible" here.


Best wishes,
Jia-Ju Bai