On Sun, 13 Sep 2009, Atsushi Nemoto wrote: > On Fri, 11 Sep 2009 18:21:00 +0200 (CEST), Julia Lawall <julia@xxxxxxx> wrote: > > From: Julia Lawall <julia@xxxxxxx> > > > > Error handling code following a kzalloc should free the allocated data. > > Error handling code following an ioremap should iounmap the allocated data. > > > > The semantic match that finds the first problem is as follows: > > (http://www.emn.fr/x-info/coccinelle/) > > Thank you for finding this out. > > 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. thanks, julia > And I like goto-style cleanup, as Mark Brown said in reply for your > sound/soc patch. > > Could you make a new patch? > > --- > Atsushi Nemoto > -- > To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html >
