Re: [PATCH 1/8] arch/mips/txx9: introduce missing kfree, iounmap

[Atsushi Nemoto <anemo@mba.ocn.ne.jp>]

On Sun, 13 Sep 2009 17:14:06 +0200 (CEST), Julia Lawall <julia@diku.dk> wrote:
> > This patch add some correctness, but obviously incomplete: there are
> > more error pathes without iounmap/kfree/etc. in this function.
> 
> The only other error path that I see is:
> 
>        pdev = platform_device_alloc("leds-gpio", basenum);
>         if (!pdev)
>                 return;
> 
> But at that point the call gpiochip_add(&iocled->chip) has already 
> succeeded.  From looking at this function, I have the impression that it 
> makes the iocled structure available from a global array, gpio_desc.  
> Since the function containing the above code doesn't return any error 
> code, perhaps the caller will not know whether this platform_device_alloc 
> error occurred or not.  There would also be at least the problem of 
> getting the pointer out of the gpio_desc structure.  I guess this could be 
> done with gpiochip_remove?
> 
> I can certainly make a new patch using the goto style, but let me know 
> what to do about the above issue.

Yes, this gpiochip is only used by leds-gpio driver.  So
gpiochip_remove() would be the right thing to do when something
failed.

Also there is one another error path: platform_device_add() failure at
the end of this function.

Thanks.
---
Atsushi Nemoto