[PATCH] mmc: moxart: fix wait_for_completion_interruptible_timeout return variable type

[PATCH] mmc: moxart: fix wait_for_completion_interruptible_timeout return variable type

[Nicholas Mc Guire]

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

Re: [PATCH] mmc: moxart: fix wait_for_completion_interruptible_timeout return variable type

[Ulf Hansson]

On 24 July 2016 at 18:32, Nicholas Mc Guire <hofrat@osadl.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@osadl.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

Re: [PATCH] mmc: moxart: fix wait_for_completion_interruptible_timeout return variable type

[Nicholas Mc Guire]

On Mon, Jul 25, 2016 at 10:29:46AM +0200, Ulf Hansson wrote:
> On 24 July 2016 at 18:32, Nicholas Mc Guire <hofrat@osadl.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@osadl.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!?
> 
oops - sorry - my bad - looks like I first added the problem
and then "found it" - will fix this up.

thx!
hofrat