2cc612b8ed
[ Upstream commit 5d33213fac5929a2e7766c88d78779fd443b0fe8 ]
The problem is this line here from subdev_do_ioctl().
client_cap->capabilities &= ~V4L2_SUBDEV_CLIENT_CAP_STREAMS;
The "client_cap->capabilities" variable is a u64. The AND operation
is supposed to clear out the V4L2_SUBDEV_CLIENT_CAP_STREAMS flag. But
because it's a 32 bit variable it accidentally clears out the high 32
bits as well.
Currently we only use the first bit and none of the upper bits so this
doesn't affect runtime behavior.
Fixes: f57fa2959244 ("media: v4l2-subdev: Add new ioctl for client capabilities")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.