Re: [tip:smp/hotplug] cpufreq: Fix up conversion to hotplug state machine

[Borislav Petkov]

On Tue, Sep 20, 2016 at 08:07:08AM -0700, tip-bot for Sebastian Andrzej Siewior wrote:
> Commit-ID:  5372e054a1928fe704cf0a5e2e139645a777b50a
> Gitweb:     http://git.kernel.org/tip/5372e054a1928fe704cf0a5e2e139645a777b50a
> Author:     Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> AuthorDate: Tue, 20 Sep 2016 16:56:28 +0200
> Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> CommitDate: Tue, 20 Sep 2016 16:59:21 +0200
> 
> cpufreq: Fix up conversion to hotplug state machine
> 
> The function cpufreq_register_driver() returns zero on success and since
> commit 27622b061eb4 ("cpufreq: Convert to hotplug state machine")
> erroneously a positive number. Due to the "if (x) assume_error" construct
> all callers assumed an error and as a consequence the cpu freq kworker
> crashes with a NULL pointer dereference.
> 
> Reset the return value back to zero in the success case.
> 
> Fixes: 27622b061eb4 ("cpufreq: Convert to hotplug state machine")
> Reported-by: Borislav Petkov <bp@xxxxxxxxx>

	-and-tested-by: me.

Thanks!

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.