Re: [PATCH] GMAC: fix simple_return.cocci warnings

[Joe Perches <joe@perches.com>]

On Sat, 2015-01-03 at 08:25 +0800, kbuild test robot wrote:
> drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c:425:1-4: WARNING: end returns can be simpified
> 
>  Simplify a trivial if-return sequence.  Possibly combine with a
>  preceding function call.
> Generated by: scripts/coccinelle/misc/simple_return.cocci
> 
> CC: Roger Chen <roger.chen@rock-chips.com>
> Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
> ---
> 
>  dwmac-rk.c |    6 +-----
>  1 file changed, 1 insertion(+), 5 deletions(-)
> 
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> @@ -422,11 +422,7 @@ static int rk_gmac_init(struct platform_
>  	if (ret)
>  		return ret;
>  
> -	ret = gmac_clk_enable(bsp_priv, true);
> -	if (ret)
> -		return ret;
> -
> -	return 0;
> +	return gmac_clk_enable(bsp_priv, true);

I think this change is not particularly better.

When the pattern is multiply repeated like:

{
	...
	foo = bar();
	if (foo)
		return foo;

	foo = baz();
	if (foo)
		return foo;

	foo = qux();
	if (foo)
		return foo;

	return 0;
}

I think it's better to not change the last
test in the sequence just to minimize overall
line count.