lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Mon, 12 Nov 2012 11:21:39 +0100 From: Pantelis Antoniou <panto@...oniou-consulting.com> To: Linus Walleij <linus.walleij@...aro.org> Cc: Thierry Reding <thierry.reding@...onic-design.de>, Richard Purdie <rpurdie@...ys.net>, Florian Tobias Schandinat <FlorianSchandinat@....de>, linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org, Koen Kooi <koen@...inion.thruhere.net>, Matt Porter <mporter@...com>, Russ Dill <Russ.Dill@...com>, linux-omap@...r.kernel.org Subject: Re: [PATCH] pwm-backlight: Pinctrl-fy 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.reding@...onic-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 majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists