Re: [PATCH] i2c-isa and w83871d sensors support

[Christoph Hellwig <hch@infradead.org>]

On Sun, Jan 05, 2003 at 06:44:55PM +0100, GertJan Spoelman wrote:
> This patch adds the i2c-isa pseudo ISA adapter and the w8387* series
> sensors support to 2.5.54 (tested on bk1 and bk3).
> 
> I've just took the code from the lm_sensor package and changed it
> to be more or less consistent with the lm75 and amd* patches Christoph
> has done.
> Christoph, maybe you could check this because I don't really understand
> all of the code and maybe it needs some more changes.

Looks fine in principle.  A few nitpicks:

> +static struct i2c_algorithm isa_algorithm = {
> +	.name		= "ISA bus algorithm",
> +	.id		= I2C_ALGO_ISA,
> +	.smbus_xfer	= NULL,
> +	.functionality	= &isa_func,
> +};

There's no need to initialize a struct member to zero/NULL.

> +static int __init isa_init(void)
> +{
> +	int res;
> +	if (isa_initialized) {
> +		pr_debug(DRV_NAME
> +		    ": i2c-isa.o: Oops, isa_init called a second time!\n");
> +		return -EBUSY;
> +	}
> +	isa_initialized = 0;
> +	if ((res = i2c_add_adapter(&isa_adapter))) {
> +		printk(KERN_ERR DRV_NAME
> +		       ": Adapter registration failed, module not inserted\n.");
> +		isa_cleanup();
> +		return res;
> +	}
> +	isa_initialized++;
> +	printk("i2c-isa.o: ISA bus access for i2c modules initialized.\n");
> +	return 0;

Please remove the <foo>_initialized handling.  It just obsfucates the code.

> +static void __exit isa_exit(void)
> +{
> +	isa_cleanup();
> +}

Just move the code from isa_cleanup into isa_exit directly.