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From: Viresh Kumar <viresh.kumar@linaro.org>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Vinod Koul <vinod.koul@intel.com>,
	linux-kernel@vger.kernel.org,
	Linus Walleij <linus.walleij@linaro.org>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/6] dma: coh901318_lli: avoid unbalanced locking
Date: Tue, 12 Feb 2013 21:27:59 +0530	[thread overview]
Message-ID: <CAKohpok8K_GTTO1mT_1yF39gHZKWKwuH=tHBd1-K8ewDpFFUew@mail.gmail.com> (raw)
In-Reply-To: <1360666720-19006-4-git-send-email-andriy.shevchenko@linux.intel.com>

On 12 February 2013 16:28, Andy Shevchenko
<andriy.shevchenko@linux.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.

Your viewpoint is fine, but we wanted the reason behind this patch
here. Please add appropriate stuff in only in logs.

> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> Cc: Linus Walleij <linus.walleij@linaro.org>
> Cc: linux-arm-kernel@lists.infradead.org
> ---
>  drivers/dma/coh901318_lli.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/dma/coh901318_lli.c b/drivers/dma/coh901318_lli.c
> index 3e96610..702112d 100644
> --- a/drivers/dma/coh901318_lli.c
> +++ b/drivers/dma/coh901318_lli.c
> @@ -61,7 +61,7 @@ coh901318_lli_alloc(struct coh901318_pool *pool, unsigned int len)
>         dma_addr_t phy;
>
>         if (len == 0)
> -               goto err;
> +               return NULL;
>
>         spin_lock(&pool->lock);
>
> --
> 1.7.10.4
>

  reply	other threads:[~2013-02-12 15:58 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-02-12 10:58 [PATCH 0/6] dma: various fixes in different DMAC drivers Andy Shevchenko
2013-02-12 10:58 ` [PATCH 1/6] of: dma: protect list write operation by spin_lock Andy Shevchenko
2013-02-12 10:58 ` [PATCH 2/6] dmaengine.h: remove redundant else keyword Andy Shevchenko
2013-02-12 15:01   ` Viresh Kumar
2013-02-12 10:58 ` [PATCH 3/6] dma: coh901318_lli: avoid unbalanced locking Andy Shevchenko
2013-02-12 15:57   ` Viresh Kumar [this message]
2013-02-15 14:52   ` Linus Walleij
2013-02-15 14:56     ` Andy Shevchenko
2013-02-15 20:52       ` Linus Walleij
2013-02-12 10:58 ` [PATCH 4/6] dma: coh901318_lli: set residue only if dma is in progress Andy Shevchenko
2013-02-15 14:53   ` Linus Walleij
2013-02-12 10:58 ` [PATCH 5/6] edma: do not waste memory for dma_mask Andy Shevchenko
2013-02-12 10:58 ` [PATCH 6/6] dma: tegra20-apb-dma: remove unnecessary assignment Andy Shevchenko
2013-02-13 12:40   ` Laxman Dewangan
2013-02-12 16:02 ` [PATCH 0/6] dma: various fixes in different DMAC drivers Viresh Kumar

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