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[ Upstream commit cc6e8d1ccea792d8550428e0831e3a35b0ccfddc ] The ivtv driver has a structure named ivtv_open_id that models an open file handle for the device. It embeds a v4l2_fh instance for file handles that correspond to a V4L2 video device, and stores a pointer to that v4l2_fh in struct ivtv_stream to identify which open file handle owns a particular stream. In addition to video devices, streams can be owned by ALSA PCM devices. Those devices do not make use of the v4l2_fh instance for obvious reasons, but the snd_ivtv_pcm_capture_open() function still initializes a "fake" v4l2_fh for the sole purpose of using it as an open file handle identifier. The v4l2_fh is not properly destroyed when the ALSA PCM device is closed, leading to possible resource leaks. Fortunately, the v4l2_fh instance pointed to by ivtv_stream is not accessed, only the pointer value is used for comparison. Replace it with a pointer to the ivtv_open_id structure that embeds the v4l2_fh, and don't initialize the v4l2_fh for ALSA PCM devices. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> |
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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.