[v3,net-next,5/5] net: dsa: lan9303: refactor lan9303_get_ethtool_stats

In lan9303_get_ethtool_stats: Get rid of 0x400 constant magic
by using new lan9303_read_switch_reg() inside loop.
Reduced scope of two variables.

Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no>
---
 drivers/net/dsa/lan9303-core.c | 26 ++++++++++++++++----------
 1 file changed, 16 insertions(+), 10 deletions(-)

On Thu, Aug 03, 2017 at 11:45:07AM +0200, Egil Hjelmeland wrote:
> In lan9303_get_ethtool_stats: Get rid of 0x400 constant magic
> by using new lan9303_read_switch_reg() inside loop.
> Reduced scope of two variables.
> 
> Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

On 08/03/2017 02:45 AM, Egil Hjelmeland wrote:
> In lan9303_get_ethtool_stats: Get rid of 0x400 constant magic
> by using new lan9303_read_switch_reg() inside loop.
> Reduced scope of two variables.
> 
> Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no>
> ---
>  drivers/net/dsa/lan9303-core.c | 26 ++++++++++++++++----------
>  1 file changed, 16 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
> index 6f409755ba1a..5aaa46146c27 100644
> --- a/drivers/net/dsa/lan9303-core.c
> +++ b/drivers/net/dsa/lan9303-core.c
> @@ -435,6 +435,13 @@ static int lan9303_write_switch_port(
>  		chip, LAN9303_SWITCH_PORT_REG(port, regnum), val);
>  }
>  
> +static int lan9303_read_switch_port(
> +	struct lan9303 *chip, int port, u16 regnum, u32 *val)
> +{

This indentation is really funny, why not just break it up that way:

static int lan9303_read_switch_port(struct lan9303 *chip, int port
				    u16 regnum, u32 *val)
{
}

This applies to patch 5 as well, other than that:

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>

> +	return lan9303_read_switch_reg(
> +		chip, LAN9303_SWITCH_PORT_REG(port, regnum), val);
> +}
> +
>  static int lan9303_detect_phy_setup(struct lan9303 *chip)
>  {
>  	int reg;
> @@ -709,19 +716,18 @@ static void lan9303_get_ethtool_stats(struct dsa_switch *ds, int port,
>  				      uint64_t *data)
>  {
>  	struct lan9303 *chip = ds->priv;
> -	u32 reg;
> -	unsigned int u, poff;
> -	int ret;
> -
> -	poff = port * 0x400;
> +	unsigned int u;
>  
>  	for (u = 0; u < ARRAY_SIZE(lan9303_mib); u++) {
> -		ret = lan9303_read_switch_reg(chip,
> -					      lan9303_mib[u].offset + poff,
> -					      &reg);
> +		u32 reg;
> +		int ret;
> +
> +		ret = lan9303_read_switch_port(
> +			chip, port, lan9303_mib[u].offset, &reg);
> +
>  		if (ret)
> -			dev_warn(chip->dev, "Reading status reg %u failed\n",
> -				 lan9303_mib[u].offset + poff);
> +			dev_warn(chip->dev, "Reading status port %d reg %u failed\n",
> +				 port, lan9303_mib[u].offset);
>  		data[u] = reg;
>  	}
>  }
>

Den 03. aug. 2017 20:04, skrev Florian Fainelli:
> On 08/03/2017 02:45 AM, Egil Hjelmeland wrote:
>> In lan9303_get_ethtool_stats: Get rid of 0x400 constant magic
>> by using new lan9303_read_switch_reg() inside loop.
>> Reduced scope of two variables.
>>
>> Signed-off-by: Egil Hjelmeland <privat@egil-hjelmeland.no>
>> ---
>>   drivers/net/dsa/lan9303-core.c | 26 ++++++++++++++++----------
>>   1 file changed, 16 insertions(+), 10 deletions(-)
>>
>> diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
>> index 6f409755ba1a..5aaa46146c27 100644
>> --- a/drivers/net/dsa/lan9303-core.c
>> +++ b/drivers/net/dsa/lan9303-core.c
>> @@ -435,6 +435,13 @@ static int lan9303_write_switch_port(
>>   		chip, LAN9303_SWITCH_PORT_REG(port, regnum), val);
>>   }
>>   
>> +static int lan9303_read_switch_port(
>> +	struct lan9303 *chip, int port, u16 regnum, u32 *val)
>> +{
> 
> This indentation is really funny, why not just break it up that way:
> 
> static int lan9303_read_switch_port(struct lan9303 *chip, int port
> 				    u16 regnum, u32 *val)
> {
> }
> 
> This applies to patch 5 as well, other than that:
> 
> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
> 

Because it is the form that passes scripts/checkpatch.pl which I find
easiest to type and maintain.

- No need to fine tune spaces.
- No need to change indentation if later renaming function to name of
   different length.

Do you have any references backing up your claim this is wrong?

Cheers
Egil