linux-kernel - Re: [PATCH 3/6] dma: coh901318

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Message-ID: <CAHp75VcT-3UUYZSc_iopH8M7z0GoYKhkf-O1yTsqSODRHaCHdw@mail.gmail.com>
Date:	Fri, 15 Feb 2013 16:56:55 +0200
From:	Andy Shevchenko <andy.shevchenko@...il.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
	Vinod Koul <vinod.koul@...el.com>,
	linux-kernel@...r.kernel.org,
	Viresh Kumar <viresh.kumar@...aro.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/6] dma: coh901318_lli: avoid unbalanced locking

On Fri, Feb 15, 2013 at 4:52 PM, Linus Walleij <linus.walleij@...aro.org> wrote:
> On Tue, Feb 12, 2013 at 11:58 AM, Andy Shevchenko
> <andriy.shevchenko@...ux.intel.com> wrote:
>
>> I have not checked the code but there is a possibility that custom pool->lock
>> is not needed at all due to dma_pool contains it's own lock.
>
> Can you please change the description to something like:
>
> "The coh901318_lli allocator releases a lock on the exit path without
> taking it first".

In v2 (that by fact already applied) I put following description:

    In case the len is 0 we must return without trying to unlock the
lock that was
    not locked.

Does it fit your suggestion?

-- 
With Best Regards,
Andy Shevchenko
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