From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: Hans Verkuil <hverkuil@xs4all.nl>,
linux-media@vger.kernel.org, tomi.valkeinen@ideasonboard.com,
jacopo.mondi@ideasonboard.com, bingbu.cao@intel.com,
hongju.wang@intel.com, Alain Volmat <alain.volmat@foss.st.com>
Subject: Re: [PATCH v4 9/9] media: v4l: subdev: Warn on stream when accessing stream-unaware data
Date: Thu, 26 Oct 2023 21:09:31 +0300 [thread overview]
Message-ID: <20231026180931.GI26306@pendragon.ideasonboard.com> (raw)
In-Reply-To: <ZTqm-Cd4aPjwosYN@kekkonen.localdomain>
On Thu, Oct 26, 2023 at 05:50:48PM +0000, Sakari Ailus wrote:
> On Thu, Oct 26, 2023 at 05:20:11PM +0300, Laurent Pinchart wrote:
> > On Thu, Oct 26, 2023 at 07:40:52AM +0000, Sakari Ailus wrote:
> > > On Thu, Oct 26, 2023 at 09:36:41AM +0200, Hans Verkuil wrote:
> > > > On 26/10/2023 09:03, Sakari Ailus wrote:
> > > > > Warn if the stream is set ot a non-zero value on sub-device pad state
> > > > > access functions. A driver bug is required for triggering the warning.
> > > >
> > > > More confusion here: why not merge this into patch 2?
> > >
> > > I can squash it there.
> >
> > I'm fine with that, but I wonder if we need a WARN_ON() in that case.
> > Won't driver developers notice the bug, given they'll get a NULL pointer
> > ?
>
> Obviously they would. But it's also that the function shouldn't be called
> that way: it's an obvious omission of input validation elsewhere and that
> should be fixed.
Yes, but won't the NULL pointer that the driver receive lead to the
issue being fixed ? I expect a crash during development.
--
Regards,
Laurent Pinchart
prev parent reply other threads:[~2023-10-26 18:09 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-26 7:03 [PATCH v4 0/9] Unify sub-device state access functions Sakari Ailus
2023-10-26 7:03 ` [PATCH v4 1/9] media: v4l: subdev: Store the sub-device in the sub-device state Sakari Ailus
2023-10-26 7:03 ` [PATCH v4 2/9] media: v4l: subdev: Also return pads array information on stream functions Sakari Ailus
2023-10-26 7:11 ` Hans Verkuil
2023-10-26 7:39 ` Sakari Ailus
2023-10-26 7:03 ` [PATCH v4 3/9] media: v4l: subdev: Rename sub-device state information access functions Sakari Ailus
2023-10-26 7:26 ` Hans Verkuil
2023-10-26 8:25 ` Sakari Ailus
2023-10-26 9:51 ` Laurent Pinchart
2023-10-26 10:10 ` Sakari Ailus
2023-10-26 13:40 ` Laurent Pinchart
2023-10-26 7:03 ` [PATCH v4 4/9] media: v4l: subdev: v4l2_subdev_state_get_format always returns format now Sakari Ailus
2023-10-26 7:03 ` [PATCH v4 5/9] media: v4l: subdev: Make stream argument optional in state access functions Sakari Ailus
2023-10-26 13:49 ` Laurent Pinchart
2023-10-27 9:06 ` Sakari Ailus
2023-10-27 9:10 ` Laurent Pinchart
2023-10-27 9:12 ` Sakari Ailus
2023-10-27 9:14 ` Laurent Pinchart
2023-10-27 9:21 ` Sakari Ailus
2023-10-26 7:03 ` [PATCH v4 6/9] media: v4l: subdev: Switch to stream-aware state functions Sakari Ailus
2023-10-26 7:03 ` [PATCH v4 7/9] media: v4l: subdev: Remove stream-unaware sub-device state access Sakari Ailus
2023-10-26 13:54 ` Laurent Pinchart
2023-10-26 7:03 ` [PATCH v4 8/9] media: v4l: subdev: Return NULL from pad access functions on error Sakari Ailus
2023-10-26 7:35 ` Hans Verkuil
2023-10-26 7:43 ` Sakari Ailus
2023-10-26 13:55 ` Laurent Pinchart
2023-10-26 7:03 ` [PATCH v4 9/9] media: v4l: subdev: Warn on stream when accessing stream-unaware data Sakari Ailus
2023-10-26 7:36 ` Hans Verkuil
2023-10-26 7:40 ` Sakari Ailus
2023-10-26 14:20 ` Laurent Pinchart
2023-10-26 17:50 ` Sakari Ailus
2023-10-26 18:09 ` Laurent Pinchart [this message]
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=20231026180931.GI26306@pendragon.ideasonboard.com \
--to=laurent.pinchart@ideasonboard.com \
--cc=alain.volmat@foss.st.com \
--cc=bingbu.cao@intel.com \
--cc=hongju.wang@intel.com \
--cc=hverkuil@xs4all.nl \
--cc=jacopo.mondi@ideasonboard.com \
--cc=linux-media@vger.kernel.org \
--cc=sakari.ailus@linux.intel.com \
--cc=tomi.valkeinen@ideasonboard.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.