From: Arınç ÜNAL <arinc.unal@arinc9.com>

There're two code paths for setting up port 5:

mt7530_setup()
-> mt7530_setup_port5()

mt753x_phylink_mac_config()
-> mt753x_mac_config()
   -> mt7530_mac_config()
      -> mt7530_setup_port5()

On the first code path, priv->p5_intf_sel is either set to
P5_INTF_SEL_PHY_P0 or P5_INTF_SEL_PHY_P4 when mt7530_setup_port5() is run.

On the second code path, priv->p5_intf_sel is set to P5_INTF_SEL_GMAC5 when
mt7530_setup_port5() is run.

Empty the default case which will never run but is needed nonetheless to
handle all the remaining enumeration values.

Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
---
 drivers/net/dsa/mt7530.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index d837aa20968c..50f150ff481a 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -930,9 +930,7 @@ static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface)
 		val &= ~MHWTRAP_P5_DIS;
 		break;
 	default:
-		dev_err(ds->dev, "Unsupported p5_intf_sel %d\n",
-			priv->p5_intf_sel);
-		goto unlock_exit;
+		break;
 	}
 
 	/* Setup RGMII settings */
@@ -962,7 +960,6 @@ static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface)
 	dev_dbg(ds->dev, "Setup P5, HWTRAP=0x%x, intf_sel=%s, phy-mode=%s\n",
 		val, p5_intf_modes(priv->p5_intf_sel), phy_modes(interface));
 
-unlock_exit:
 	mutex_unlock(&priv->reg_mutex);
 }
 
-- 
2.39.2

On Mon, May 22, 2023 at 03:15:11PM +0300, arinc9.unal@gmail.com wrote:
>  	default:
> -		dev_err(ds->dev, "Unsupported p5_intf_sel %d\n",
> -			priv->p5_intf_sel);
> -		goto unlock_exit;

You could have probably left a comment though (that doesn't cost in
terms of compiled code):

		/* We never call mt7530_setup_port5() with P5_DISABLED */

> +		break;
>  	}

On 24.05.2023 21:05, Vladimir Oltean wrote:
> On Mon, May 22, 2023 at 03:15:11PM +0300, arinc9.unal@gmail.com wrote:
>>   	default:
>> -		dev_err(ds->dev, "Unsupported p5_intf_sel %d\n",
>> -			priv->p5_intf_sel);
>> -		goto unlock_exit;
> 
> You could have probably left a comment though (that doesn't cost in
> terms of compiled code):
> 
> 		/* We never call mt7530_setup_port5() with P5_DISABLED */

I remove P5_DISABLED with later patches so I don't see a reason to add 
this then remove it on the same patch series.

Arınç

On Mon, May 22, 2023 at 03:15:11PM +0300, arinc9.unal@gmail.com wrote:
> From: Arınç ÜNAL <arinc.unal@arinc9.com>
> 
> There're two code paths for setting up port 5:
> 
> mt7530_setup()
> -> mt7530_setup_port5()
> 
> mt753x_phylink_mac_config()
> -> mt753x_mac_config()
>    -> mt7530_mac_config()
>       -> mt7530_setup_port5()
> 
> On the first code path, priv->p5_intf_sel is either set to
> P5_INTF_SEL_PHY_P0 or P5_INTF_SEL_PHY_P4 when mt7530_setup_port5() is run.
> 
> On the second code path, priv->p5_intf_sel is set to P5_INTF_SEL_GMAC5 when
> mt7530_setup_port5() is run.
> 
> Empty the default case which will never run but is needed nonetheless to
> handle all the remaining enumeration values.
> 
> Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>
> Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
> ---

Reviewed-by: Vladimir Oltean <olteanv@gmail.com>