[07/19] usbnet: smsc95xx: Split the reset function
diff mbox series

Message ID 20190103011040.25974-8-marex@denx.de
State Changes Requested
Delegated to: David Miller
Headers show
Series
  • [01/19] usbnet: smsc95xx: Fix memory leak in smsc95xx_bind
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Commit Message

Marek Vasut Jan. 3, 2019, 1:10 a.m. UTC
The smsc95xx_reset() is called either during bind or later during
the driver operation. However, the MII structure can be populated
only once, when the smsc95xx_reset() is called from the drivers
bind function.

Split the reset function to allow filling the MII structure only
once. This is done in preparation of phydev conversion, where the
code will connect to PHY between those two halves of the reset
function.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: David S. Miller <davem@davemloft.net>
Cc: Nisar Sayed <Nisar.Sayed@microchip.com>
Cc: Woojung Huh <Woojung.Huh@microchip.com>
Cc: Andrew Lunn <andrew@lunn.ch>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-usb@vger.kernel.org
To: netdev@vger.kernel.org
---
 drivers/net/usb/smsc95xx.c | 36 +++++++++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 9 deletions(-)

Comments

Oliver Neukum Jan. 7, 2019, 11:05 a.m. UTC | #1
On Do, 2019-01-03 at 02:10 +0100, Marek Vasut wrote:
> The smsc95xx_reset() is called either during bind or later during
> the driver operation. However, the MII structure can be populated
> only once, when the smsc95xx_reset() is called from the drivers
> bind function.
> 
> Split the reset function to allow filling the MII structure only
> once. This is done in preparation of phydev conversion, where the
> code will connect to PHY between those two halves of the reset
> function.
> 
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: David S. Miller <davem@davemloft.net>
> Cc: Nisar Sayed <Nisar.Sayed@microchip.com>
> Cc: Woojung Huh <Woojung.Huh@microchip.com>
> Cc: Andrew Lunn <andrew@lunn.ch>
> Cc: Florian Fainelli <f.fainelli@gmail.com>
> Cc: linux-usb@vger.kernel.org
> To: netdev@vger.kernel.org
> ---
>  drivers/net/usb/smsc95xx.c | 36 +++++++++++++++++++++++++++---------
>  1 file changed, 27 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
> index 551d05eb258e..e40cde490a42 100644
> --- a/drivers/net/usb/smsc95xx.c
> +++ b/drivers/net/usb/smsc95xx.c
> @@ -944,14 +944,6 @@ static int smsc95xx_phy_initialize(struct usbnet *dev)
>  {
>  	int bmcr, ret, timeout = 0;
>  
> -	/* Initialize MII structure */
> -	dev->mii.dev = dev->net;
> -	dev->mii.mdio_read = smsc95xx_mdio_read;
> -	dev->mii.mdio_write = smsc95xx_mdio_write;
> -	dev->mii.phy_id_mask = 0x1f;
> -	dev->mii.reg_num_mask = 0x1f;
> -	dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
> -
>  	/* reset phy and wait for reset to complete */
>  	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
>  
> @@ -985,7 +977,7 @@ static int smsc95xx_phy_initialize(struct usbnet *dev)
>  	return 0;
>  }
>  
> -static int smsc95xx_reset(struct usbnet *dev)
> +static int smsc95xx_reset_pre(struct usbnet *dev)

Hi,

may I request that you choose different names? These names suggest a
connection with the pre_reset() and post_reset() methods of a USB
driver.

	Regards
		Oliver

Patch
diff mbox series

diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
index 551d05eb258e..e40cde490a42 100644
--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -944,14 +944,6 @@  static int smsc95xx_phy_initialize(struct usbnet *dev)
 {
 	int bmcr, ret, timeout = 0;
 
-	/* Initialize MII structure */
-	dev->mii.dev = dev->net;
-	dev->mii.mdio_read = smsc95xx_mdio_read;
-	dev->mii.mdio_write = smsc95xx_mdio_write;
-	dev->mii.phy_id_mask = 0x1f;
-	dev->mii.reg_num_mask = 0x1f;
-	dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
-
 	/* reset phy and wait for reset to complete */
 	smsc95xx_mdio_write(dev->net, dev->mii.phy_id, MII_BMCR, BMCR_RESET);
 
@@ -985,7 +977,7 @@  static int smsc95xx_phy_initialize(struct usbnet *dev)
 	return 0;
 }
 
-static int smsc95xx_reset(struct usbnet *dev)
+static int smsc95xx_reset_pre(struct usbnet *dev)
 {
 	struct smsc95xx_priv *pdata = (struct smsc95xx_priv *)(dev->data[0]);
 	u32 read_buf, write_buf, burst_cap;
@@ -1165,6 +1157,13 @@  static int smsc95xx_reset(struct usbnet *dev)
 	}
 
 	smsc95xx_set_multicast(dev->net);
+	return 0;
+}
+
+static int smsc95xx_reset_post(struct usbnet *dev)
+{
+	u32 read_buf;
+	int ret;
 
 	ret = smsc95xx_phy_initialize(dev);
 	if (ret < 0) {
@@ -1199,6 +1198,25 @@  static int smsc95xx_reset(struct usbnet *dev)
 	return 0;
 }
 
+static int smsc95xx_reset(struct usbnet *dev)
+{
+	int ret;
+
+	ret = smsc95xx_reset_pre(dev);
+	if (ret)
+		return ret;
+
+	/* Initialize MII structure */
+	dev->mii.dev = dev->net;
+	dev->mii.mdio_read = smsc95xx_mdio_read;
+	dev->mii.mdio_write = smsc95xx_mdio_write;
+	dev->mii.phy_id_mask = 0x1f;
+	dev->mii.reg_num_mask = 0x1f;
+	dev->mii.phy_id = SMSC95XX_INTERNAL_PHY_ID;
+
+	return smsc95xx_reset_post(dev);
+}
+
 static const struct net_device_ops smsc95xx_netdev_ops = {
 	.ndo_open		= usbnet_open,
 	.ndo_stop		= usbnet_stop,