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Jason Gunthorpe 9a302449a5 vfio/mdev: Add missing reference counting to mdev_type
struct mdev_type holds a pointer to the kref'd object struct mdev_parent,
but doesn't hold the kref. The lifetime of the parent becomes implicit
because parent_remove_sysfs_files() is supposed to remove all the access
before the parent can be freed, but this is very hard to reason about.

Make it obviously correct by adding the missing get.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Message-Id: <7-v2-d36939638fc6+d54-vfio2_jgg@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2021-04-07 15:39:17 -06:00
arch RISC-V Fixes for 5.12-rc6 2021-04-03 11:52:18 -07:00
block block: remove the unused RQF_ALLOCED flag 2021-04-02 11:18:31 -06:00
certs
crypto
Documentation vfio/mdev: Simplify driver registration 2021-04-07 15:39:16 -06:00
drivers vfio/mdev: Add missing reference counting to mdev_type 2021-04-07 15:39:17 -06:00
fs io_uring-5.12-2021-04-03 2021-04-03 14:26:47 -07:00
include vfio/mdev: Use struct mdev_type in struct mdev_device 2021-04-07 15:39:17 -06:00
init
ipc
kernel Fix stack trace entry size to stop showing garbage 2021-04-02 08:39:00 -07:00
lib
LICENSES
mm
net
samples vfio/mdev: Fix missing static's on MDEV_TYPE_ATTR's 2021-04-07 15:39:15 -06:00
scripts
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tools
usr
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MAINTAINERS Char/Misc driver fixes for 5.12-rc6 2021-04-03 10:05:16 -07:00
Makefile Linux 5.12-rc6 2021-04-04 14:15:36 -07:00
README

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.