Re: [PATCH 05/20] Staging: ipack: Choose the optimum bus speed bydefault.

From: Dan Carpenter
Date: Tue Sep 11 2012 - 04:48:39 EST


On Mon, Sep 10, 2012 at 10:51:43AM +0200, Samuel Iglesias Gonsálvez wrote:
> From: Jens Taprogge <jens.taprogge@xxxxxxxxxxxx>
>
> Signed-off-by: Jens Taprogge <jens.taprogge@xxxxxxxxxxxx>
> Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@xxxxxxxxxx>
> ---
> drivers/staging/ipack/ipack.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/staging/ipack/ipack.c b/drivers/staging/ipack/ipack.c
> index 521ff55..6e0b441 100644
> --- a/drivers/staging/ipack/ipack.c
> +++ b/drivers/staging/ipack/ipack.c
> @@ -386,6 +386,11 @@ struct ipack_device *ipack_device_register(struct ipack_bus_device *bus,
> return NULL;
> }
>
> + /* if the device supports 32 MHz operation, use it. */
> + ret = bus->ops->set_clockrate(dev, dev->speed_32mhz ? 32 : 8);
> + if (ret < 0)
> + dev_err(&dev->dev, "failed to switch to 32 MHz operation.\n");

It's strange that we don't test the ->speed_8mhz flag. Do we even
need that flag? It might be better to write it like this:

if (dev->speed_32mhz) {
ret = bus->ops->set_clockrate(dev, 32);
if (ret < 0) {
dev_err(&dev->dev,
"failed to switch to 32 MHz operation.\n");
}
}

The error message is not accurate in the original code because it
says 32 even if you tried to set it to 8.

regards,
dan carpenter


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