On Sun, 13 Sep 2009 17:14:06 +0200 (CEST), Julia Lawall <firstname.lastname@example.org> 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)
> 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
Also there is one another error path: platform_device_add() failure at
the end of this function.