Re: [GIT PULL for v4.5-rc1] media controller next gen patch series

From: Geert Uytterhoeven
Date: Tue Jan 19 2016 - 05:02:39 EST

Hi Mauro,

On Tue, Jan 12, 2016 at 11:43 AM, Mauro Carvalho Chehab
<mchehab@xxxxxxxxxxxxxxx> wrote:
> That's the second part of the media patches. It contains the media controller
> next generation patches, with is the result of one year of discussions and
> development. It also contains patches to enable media controller support
> at the DVB subsystem.
> The goal is to improve the media controller to allow proper support for
> other types of Video4Linux devices (radio and TV ones) and to extend the
> media controller functionality to allow it to be used by other subsystems
> like DVB, ALSA and IIO.
> In order to use the new functionality, a new ioctl is needed
> (MEDIA_IOC_G_TOPOLOGY). As we're still discussing how to pack the struct
> fields of this ioctl in order to avoid compat32 issues, I decided to add
> a patch at the end of this series commenting out the new ioctl, in order
> to postpone the addition of the new ioctl to the next Kernel version (4.6).
> With that, no userspace visible changes should happen at the media
> controller API, as the existing ioctls are untouched. Yet, it helps
> DVB, ALSA and IIO developers to develop and test the patches adding media
> controller support there, as the core will contain all required internal
> changes to allow adding support for devices that belong to those
> subsystems.
> Regards,
> Mauro
> The following changes since commit 768acf46e1320d6c41ed1b7c4952bab41c1cde79:
> [media] rc: sunxi-cir: Initialize the spinlock properly (2015-12-23 15:51:40 -0200)
> are available in the git repository at:
> git:// tags/media/v4.5-2
> for you to fetch changes up to be0270ec89e6b9b49de7e533dd1f3a89ad34d205:
> [media] Postpone the addition of MEDIA_IOC_G_TOPOLOGY (2016-01-11 12:35:17 -0200)

After merging this into mainline, I get the BUG_ON() and crash I reported ca.
one month ago in "vsp1 BUG_ON() and crash (Re: [PATCH v9 03/12] media:
Entities, pads and links)" (



Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds