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Chris Wilson
e4edd4fcbf
Only assert that the i915_vma is now idle if and only if no other pins are present. If another user has the i915_vma pinned, they may submit more work to the i915_vma skipping the vm->mutex used to serialise the unbind. We need to wait again, if we want to continue and unbind this vma. However, if we own the i915_vma (we hold the vm->mutex for the unbind and the pin_count is 0), we can assert that the vma remains idle as we unbind. Fixes:2850748ef8("drm/i915: Pull i915_vma_pin under the vm->mutex") Closes: https://gitlab.freedesktop.org/drm/intel/issues/530 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200123224459.38128-1-chris@chris-wilson.co.uk (cherry picked from commit60e94557ff) Signed-off-by: Jani Nikula <jani.nikula@intel.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.