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Commit653055b9ac("vhost-vdpa: support get/set backend features") introduces two malfunction backend features ioctls: 1) the ioctls was blindly added to vring ioctl instead of vdpa device ioctl 2) vhost_set_backend_features() was called when dev mutex has already been held which will lead a deadlock This patch fixes the above issues. Cc: Eli Cohen <elic@nvidia.com> Reported-by: Zhu Lingshan <lingshan.zhu@intel.com> Fixes:653055b9ac("vhost-vdpa: support get/set backend features") Signed-off-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200907104343.31141-1-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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.