USB: ohci-pnx4008: I2C cleanups and fixes

Various cleanups and fixes to the i2c code in ohci-pnx4008:
* Delete empty isp1301_command. The i2c driver command implementation
  is optional, so there's no point in providing an empty
  implementation.
* Give a name to isp1301_driver. I'm surprised that i2c-core accepted
  to register this driver at all. I've chosen "isp1301_pnx" as the
  name, because it's not a generic ISP1301 driver (much like the
  isp1301_omap driver.) We might want to make the name even more
  specific (but "isp1301_ohci_pnx4008" doesn't fit.)
* The ISP1301 is definitely not a hardware monitoring device.
* Fix a memory leak on failure in isp1301_attach. If
  i2c_attach_client fails, the client is not registered so
  isp1301_detach is never called and the i2c_client memory is lost.
* Use strlcpy instead of strcpy.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/host/ohci-pnx4008.c b/drivers/usb/host/ohci-pnx4008.c
index 7062ab5..6ad8f2f 100644 (file)
--- a/drivers/usb/host/ohci-pnx4008.c
+++ b/drivers/usb/host/ohci-pnx4008.c
@@ -109,8 +109,6 @@ static struct clk *usb_clk;
 
 static int isp1301_probe(struct i2c_adapter *adap);
 static int isp1301_detach(struct i2c_client *client);
-static int isp1301_command(struct i2c_client *client, unsigned int cmd,
-                          void *arg);
 
 static const unsigned short normal_i2c[] =
     { ISP1301_I2C_ADDR, ISP1301_I2C_ADDR + 1, I2C_CLIENT_END };
@@ -123,30 +121,37 @@ static struct i2c_client_address_data addr_data = {
 };
 
 struct i2c_driver isp1301_driver = {
-       .class = I2C_CLASS_HWMON,
+       .driver = {
+               .name = "isp1301_pnx",
+       },
        .attach_adapter = isp1301_probe,
        .detach_client = isp1301_detach,
-       .command = isp1301_command
 };
 
 static int isp1301_attach(struct i2c_adapter *adap, int addr, int kind)
 {
        struct i2c_client *c;
+       int err;
 
        c = kzalloc(sizeof(*c), GFP_KERNEL);
-
        if (!c)
                return -ENOMEM;
 
-       strcpy(c->name, "isp1301");
+       strlcpy(c->name, "isp1301_pnx", I2C_NAME_SIZE);
        c->flags = 0;
        c->addr = addr;
        c->adapter = adap;
        c->driver = &isp1301_driver;
 
+       err = i2c_attach_client(c);
+       if (err) {
+               kfree(c);
+               return err;
+       }
+
        isp1301_i2c_client = c;
 
-       return i2c_attach_client(c);
+       return 0;
 }
 
 static int isp1301_probe(struct i2c_adapter *adap)
@@ -161,13 +166,6 @@ static int isp1301_detach(struct i2c_client *client)
        return 0;
 }
 
-/* No commands defined */
-static int isp1301_command(struct i2c_client *client, unsigned int cmd,
-                          void *arg)
-{
-       return 0;
-}
-
 static void i2c_write(u8 buf, u8 subaddr)
 {
        char tmpbuf[2];