linux-kernel - Re: [PATCH] mmc: moxart: fix wait_for_completion_interruptible

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Date:	Mon, 25 Jul 2016 10:29:46 +0200
From:	Ulf Hansson <ulf.hansson@...aro.org>
To:	Nicholas Mc Guire <hofrat@...dl.org>
Cc:	Luis de Bethencourt <luis@...ethencourt.com>,
	linux-mmc <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: moxart: fix wait_for_completion_interruptible_timeout
 return variable type

On 24 July 2016 at 18:32, Nicholas Mc Guire <hofrat@...dl.org> wrote:
> wait_for_completion_timeout_interruptible returns long not unsigned long
> so dma_time, which is used exclusively here, is changed to long.
>
> Fixes: 1b66e94e6b99 ("mmc: moxart: Add MOXA ART SD/MMC driver")
>
> Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
> ---
>
> API non-compliance was located by coccinelle
>
> This is mostly cosmetic since dma_time is not actually used for anything
> at present, however if it ever were, then a signal received would be
> interpreted as a large remaining jiffies left, which would be wrong.
>
> Compile tested with: moxart_defconfig + ARCH_MULTI_V4=y,
> CONFIG_ARCH_MOXART=y, CONFIG_MMC_MOXART=y
>
> Patch is against 4.7.0-rc7 (localversion-next -next-20160724)
>
>  drivers/mmc/host/moxart-mmc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/host/moxart-mmc.c b/drivers/mmc/host/moxart-mmc.c
> index 79905ce..2e5c25f 100644
> --- a/drivers/mmc/host/moxart-mmc.c
> +++ b/drivers/mmc/host/moxart-mmc.c
> @@ -257,7 +257,7 @@ static void moxart_dma_complete(void *param)
>  static void moxart_transfer_dma(struct mmc_data *data, struct moxart_host *host)
>  {
>         u32 len, dir_data, dir_slave;
> -       unsigned long dma_time;
> +       long dma_time;
>         struct dma_async_tx_descriptor *desc = NULL;
>         struct dma_chan *dma_chan;
>
> @@ -397,7 +397,7 @@ static void moxart_prepare_data(struct moxart_host *host)
>  static void moxart_request(struct mmc_host *mmc, struct mmc_request *mrq)
>  {
>         struct moxart_host *host = mmc_priv(mmc);
> -       unsigned long pio_time, flags;
> +       long pio_time, flags;

This changes "flags" too. I don't think that is what you really want, right!?

>         u32 status;
>
>         spin_lock_irqsave(&host->lock, flags);
> --
> 2.1.4
>

Kind regards
Uffe