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/openbmc/linux/drivers/media/v4l2-core/ |
H A D | v4l2-ioctl.c | 48f2650a Mon Jul 21 05:50:39 CDT 2014 Hans Verkuil <hverkuil@xs4all.nl> [media] v4l2-ioctl: don't set PRIV_MAGIC unconditionally in g_fmt()
Regression fix:
V4L2_PIX_FMT_PRIV_MAGIC should only be set for the VIDEO_CAPTURE and VIDEO_OUTPUT buffer types, and not for any others. In the case of the win format this overwrote a pointer value that is passed in from userspace.
Just set it for V4L2_BUF_TYPE_VIDEO_CAPTURE and OUTPUT only. Set it before the callback is called, just as is done for try/s_fmt, and again afterwards in case the driver zeroed it. The latter was missing in try/s_fmt, so add it there as well. Currently it is quite likely that drivers clear priv (that was needed for a long time), so it makes sense to set it twice.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com> 48f2650a Mon Jul 21 05:50:39 CDT 2014 Hans Verkuil <hverkuil@xs4all.nl> [media] v4l2-ioctl: don't set PRIV_MAGIC unconditionally in g_fmt() Regression fix: V4L2_PIX_FMT_PRIV_MAGIC should only be set for the VIDEO_CAPTURE and VIDEO_OUTPUT buffer types, and not for any others. In the case of the win format this overwrote a pointer value that is passed in from userspace. Just set it for V4L2_BUF_TYPE_VIDEO_CAPTURE and OUTPUT only. Set it before the callback is called, just as is done for try/s_fmt, and again afterwards in case the driver zeroed it. The latter was missing in try/s_fmt, so add it there as well. Currently it is quite likely that drivers clear priv (that was needed for a long time), so it makes sense to set it twice. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
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