Re: [PATCH v3 3/5] i2c: designware-baytrail: Only check iosf_mbi_available() for shared hosts

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Sat, 2016-12-10 at 23:43 +0100, Hans de Goede wrote:
> If (!shared_host) simply return 0, this avoids delaying the probe if
> iosf_mbi_available() returns false when an i2c bus is not using the
> punit semaphore.
> 
> Also move the if (!iosf_mbi_available()) check to above the
> dev_info, so that we do not repeat the dev_info on every probe
> until iosf_mbi_available() returns true.
> 

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---
> Changes in v2:
> -New patch in v2 of this set
> Changes in v3:
> -Use if (!shared_host) return 0, to simplify the non-shared_host path
>  and to avoid nested ifs
> ---
>  drivers/i2c/busses/i2c-designware-baytrail.c | 13 +++++++------
>  1 file changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-designware-baytrail.c
> b/drivers/i2c/busses/i2c-designware-baytrail.c
> index a3f581c..cf02222 100644
> --- a/drivers/i2c/busses/i2c-designware-baytrail.c
> +++ b/drivers/i2c/busses/i2c-designware-baytrail.c
> @@ -138,15 +138,16 @@ int i2c_dw_eval_lock_support(struct dw_i2c_dev
> *dev)
>  	if (ACPI_FAILURE(status))
>  		return 0;
>  
> -	if (shared_host) {
> -		dev_info(dev->dev, "I2C bus managed by PUNIT\n");
> -		dev->acquire_lock = baytrail_i2c_acquire;
> -		dev->release_lock = baytrail_i2c_release;
> -		dev->pm_runtime_disabled = true;
> -	}
> +	if (!shared_host)
> +		return 0;
>  
>  	if (!iosf_mbi_available())
>  		return -EPROBE_DEFER;
>  
> +	dev_info(dev->dev, "I2C bus managed by PUNIT\n");
> +	dev->acquire_lock = baytrail_i2c_acquire;
> +	dev->release_lock = baytrail_i2c_release;
> +	dev->pm_runtime_disabled = true;
> +
>  	return 0;
>  }

-- 
Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Intel Finland Oy