Hi Linus, On Nov 11, 2012, at 7:26 PM, Linus Walleij wrote:
> On Fri, Nov 9, 2012 at 9:06 AM, Thierry Reding > <thierry.red...@avionic-design.de> wrote: >> On Wed, Oct 31, 2012 at 05:57:27PM +0200, Pantelis Antoniou wrote: > >>> + pinctrl = devm_pinctrl_get_select_default(&pdev->dev); >>> + if (IS_ERR(pinctrl)) >>> + dev_warn(&pdev->dev, "unable to select pin group\n"); >>> + >> >> I just saw this done in a similar way in some other driver and then >> remembered your patch. When I reviewed this I wasn't sure if a warning >> was good enough in this case. I've checked the kernel tree and it seems >> like a majority handled this as failure instead of a warning. I took a >> look at the pinctrl core and it seems like indeed if neither pinctrl is >> enabled or if there isn't actually a pinmux configuration for a device, >> then devm_pinctrl_get_select_default() will actually not return an >> error, so in those cases where an error is returned it should actually >> be handled as a fatal error. > > So it depends. > > One good reason to just error out and return the error code is > if the error returned is -EPROBE_DEFER, right? > > Because then you're pinctrl driver is not up yet, and you > need to bail out and be revisited later. > > On a related key we have this debate going on with some > subsystem maintainers as to whether we should try do > centralize boilerplate like this, the lates suggestion is: > http://marc.info/?l=linux-kernel&m=135263661110528&w=2 > Interesting... This is certainly much nicer than peppering all the devices with pinctrl calls. > The fun never ends... > Indeed. > Yours, > Linus Walleij Regards -- Pantelis -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
