From: manjugk@ti.com (G, Manjunath Kondaiah)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 4/5] gpiolib: handle deferral probe error
Date: Wed, 12 Oct 2011 11:44:32 +0530 [thread overview]
Message-ID: <20111012061432.GA2080@manju-desktop> (raw)
In-Reply-To: <CACxGe6tmjQGw77NMNYLWJHMAtmF9fk_9HnHtbrMhzkKEC1HG=Q@mail.gmail.com>
On Fri, Oct 07, 2011 at 04:09:38PM -0600, Grant Likely wrote:
> On Fri, Oct 7, 2011 at 4:06 AM, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> > On Fri, 07 Oct 2011 10:33:09 +0500
> > "G, Manjunath Kondaiah" <manjugk@ti.com> wrote:
> >
> >>
> >> The gpio library should return -EPROBE_DEFER in gpio_request
> >> if gpio driver is not ready.
> >
> > Why not use the perfectly good existing error codes we have for this ?
> >
> > We have EAGAIN and EUNATCH both of which look sensible.
>
> I want a distinct error code for probe deferral so that a) it doesn't
> overlap with something a driver is already doing, and b) so that all
> the users can be found again at a later date.
>
> That said, I'm not in agreement with this patch. It is fine for gpio
> lib to have a code that means the pin doesn't exist (yet), but the
> device driver needs to be the one to decide whether or not it is
> appropriate to use probe deferral.
During gpio_request, driver gpio_request is not available. How can we expect
driver to request deferred probe in this case?
-M
next prev parent reply other threads:[~2011-10-12 6:14 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1317963790-29426-1-git-send-email-manjugk@ti.com>
[not found] ` <1317963790-29426-2-git-send-email-manjugk@ti.com>
2011-10-07 6:43 ` [PATCH 1/5] drivercore: add new error value for deferred probe Greg KH
2011-10-07 10:00 ` Mark Brown
2011-10-07 22:12 ` Grant Likely
2011-10-07 23:28 ` Valdis.Kletnieks at vt.edu
2011-10-08 0:12 ` Greg KH
2011-10-09 22:59 ` Grant Likely
2011-10-10 1:06 ` Greg KH
2011-10-12 6:18 ` G, Manjunath Kondaiah
2011-10-13 4:10 ` Grant Likely
[not found] ` <1317963790-29426-3-git-send-email-manjugk@ti.com>
2011-10-07 6:49 ` [PATCH 2/5] drivercore: Add driver probe deferral mechanism Greg KH
2011-10-07 20:57 ` Josh Triplett
2011-10-07 21:23 ` Greg KH
2011-10-08 4:03 ` Josh Triplett
2011-10-08 15:55 ` Greg KH
2011-10-08 18:18 ` Josh Triplett
2011-10-10 17:37 ` Andrei Warkentin
2011-10-11 12:29 ` Ming Lei
2011-10-13 4:09 ` Grant Likely
2011-10-13 14:18 ` Ming Lei
2011-10-13 14:31 ` Alan Stern
2011-10-13 15:21 ` Ming Lei
2011-10-13 16:04 ` Alan Stern
2011-10-14 0:13 ` Ming Lei
2011-10-13 17:15 ` Grant Likely
2011-10-13 18:16 ` Alan Stern
2011-10-13 18:28 ` Grant Likely
2011-10-14 15:39 ` Alan Stern
2011-10-14 16:17 ` Grant Likely
2011-10-14 16:33 ` Alan Stern
2011-10-14 17:20 ` Grant Likely
2011-10-14 17:33 ` Alan Stern
2011-10-14 18:25 ` Grant Likely
2011-10-14 18:39 ` Alan Stern
2011-10-14 19:07 ` Grant Likely
2011-10-14 18:56 ` David Daney
2011-10-14 19:03 ` Grant Likely
2011-10-14 19:09 ` David Daney
2011-10-14 15:37 ` Alan Stern
2011-10-12 7:04 ` G, Manjunath Kondaiah
2011-10-07 21:28 ` Grant Likely
2011-10-07 6:50 ` [PATCH 0/5] Driver Probe Deferral Mechanism Greg KH
2011-10-07 7:37 ` G, Manjunath Kondaiah
[not found] ` <1317963790-29426-5-git-send-email-manjugk@ti.com>
2011-10-07 10:06 ` [PATCH 4/5] gpiolib: handle deferral probe error Alan Cox
2011-10-07 22:09 ` Grant Likely
2011-10-12 6:14 ` G, Manjunath Kondaiah [this message]
2011-10-13 4:12 ` Grant Likely
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20111012061432.GA2080@manju-desktop \
--to=manjugk@ti.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).