[-next,v2,1/2] net: tc35815: Fix build error due to missed API change

Commit 7f854420fbfe ("phy: Add API for {un}registering an mdio device to
a bus") introduces an API to access mii_bus structures, but missed to
update the tc35815 driver. This results in the following error message.

drivers/net/ethernet/toshiba/tc35815.c: In function 'tc_mii_probe':
drivers/net/ethernet/toshiba/tc35815.c:617:18: error:
	'struct mii_bus' has no member named 'phy_map'
drivers/net/ethernet/toshiba/tc35815.c:623:24: error:
	'struct mii_bus' has no member named 'phy_map'

Instead of looping over the list of phy addresses to find a phy chip,
use phy_find_first(). While the intent of the original code was to return
an error if more than one phy was specified, this code path was never
executed because the loop aborted after finding the first phy. The
original code is therefore semantically identical to phy_find_first(),
thus it is simpler and more straightforward to use phy_find_first()
directly.

Fixes: 7f854420fbfe ("phy: Add API for {un}registering an mdio device to a bus")
Cc: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
v2: Use phy_find_first() instead of open-coding it.

 drivers/net/ethernet/toshiba/tc35815.c | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

On Sun, Jan 10, 2016 at 07:10:44AM -0800, Guenter Roeck wrote:
> Commit 7f854420fbfe ("phy: Add API for {un}registering an mdio device to
> a bus") introduces an API to access mii_bus structures, but missed to
> update the tc35815 driver. This results in the following error message.
> 
> drivers/net/ethernet/toshiba/tc35815.c: In function 'tc_mii_probe':
> drivers/net/ethernet/toshiba/tc35815.c:617:18: error:
> 	'struct mii_bus' has no member named 'phy_map'
> drivers/net/ethernet/toshiba/tc35815.c:623:24: error:
> 	'struct mii_bus' has no member named 'phy_map'
> 
> Instead of looping over the list of phy addresses to find a phy chip,
> use phy_find_first(). While the intent of the original code was to return
> an error if more than one phy was specified, this code path was never
> executed because the loop aborted after finding the first phy. The
> original code is therefore semantically identical to phy_find_first(),
> thus it is simpler and more straightforward to use phy_find_first()
> directly.
> 
> Fixes: 7f854420fbfe ("phy: Add API for {un}registering an mdio device to a bus")
> Cc: Andrew Lunn <andrew@lunn.ch>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

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

Thanks
	Andrew

> ---
> v2: Use phy_find_first() instead of open-coding it.
> 
>  drivers/net/ethernet/toshiba/tc35815.c | 17 ++---------------
>  1 file changed, 2 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/net/ethernet/toshiba/tc35815.c b/drivers/net/ethernet/toshiba/tc35815.c
> index fed5e3dfbc8f..71efe0092bec 100644
> --- a/drivers/net/ethernet/toshiba/tc35815.c
> +++ b/drivers/net/ethernet/toshiba/tc35815.c
> @@ -608,23 +608,10 @@ static void tc_handle_link_change(struct net_device *dev)
>  static int tc_mii_probe(struct net_device *dev)
>  {
>  	struct tc35815_local *lp = netdev_priv(dev);
> -	struct phy_device *phydev = NULL;
> -	int phy_addr;
> +	struct phy_device *phydev;
>  	u32 dropmask;
>  
> -	/* find the first phy */
> -	for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) {
> -		if (lp->mii_bus->phy_map[phy_addr]) {
> -			if (phydev) {
> -				printk(KERN_ERR "%s: multiple PHYs found\n",
> -				       dev->name);
> -				return -EINVAL;
> -			}
> -			phydev = lp->mii_bus->phy_map[phy_addr];
> -			break;
> -		}
> -	}
> -
> +	phydev = phy_find_first(lp->mii_bus);
>  	if (!phydev) {
>  		printk(KERN_ERR "%s: no PHY found\n", dev->name);
>  		return -ENODEV;
> -- 
> 2.1.4
>

From: Guenter Roeck <linux@roeck-us.net>
Date: Sun, 10 Jan 2016 07:10:44 -0800

> Commit 7f854420fbfe ("phy: Add API for {un}registering an mdio device to
> a bus") introduces an API to access mii_bus structures, but missed to
> update the tc35815 driver. This results in the following error message.
> 
> drivers/net/ethernet/toshiba/tc35815.c: In function 'tc_mii_probe':
> drivers/net/ethernet/toshiba/tc35815.c:617:18: error:
> 	'struct mii_bus' has no member named 'phy_map'
> drivers/net/ethernet/toshiba/tc35815.c:623:24: error:
> 	'struct mii_bus' has no member named 'phy_map'
> 
> Instead of looping over the list of phy addresses to find a phy chip,
> use phy_find_first(). While the intent of the original code was to return
> an error if more than one phy was specified, this code path was never
> executed because the loop aborted after finding the first phy. The
> original code is therefore semantically identical to phy_find_first(),
> thus it is simpler and more straightforward to use phy_find_first()
> directly.
> 
> Fixes: 7f854420fbfe ("phy: Add API for {un}registering an mdio device to a bus")
> Cc: Andrew Lunn <andrew@lunn.ch>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Applied.