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commitb8f9d7f37bupstream. As explained by Robin Murphy: > the IOMMU shutdown disables paging, so if the VOP is still > scanning out then that will result in whatever IOVAs it was using now going > straight out onto the bus as physical addresses. We had a more radical approach before in commit7f3ef5dedb("drm/rockchip: Allow driver to be shutdown on reboot/kexec") but that resulted in new warnings and oopses on shutdown on rk3399 chromeos devices. So second try is resurrecting Vicentes shutdown change which should achieve the same result but in a less drastic way. Fixes:63238173b2("Revert "drm/rockchip: Allow driver to be shutdown on reboot/kexec"") Cc: Jeffy Chen <jeffy.chen@rock-chips.com> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Brian Norris <briannorris@chromium.org> Cc: Doug Anderson <dianders@chromium.org> Cc: stable@vger.kernel.org Suggested-by: JeffyChen <jeffy.chen@rock-chips.com> Suggested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Vicente Bergas <vicencb@gmail.com> [adapted commit message to explain the history] Signed-off-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Brian Norris <briannorris@chromium.org> Tested-by: Douglas Anderson <dianders@chromium.org> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190402113753.10118-1-heiko@sntech.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.