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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c74d8eb564
This patch fixes a kernel panic issue which happened when drm driver is closed while modetest. This issue could be reproduced easily by launching modetest with page flip repeatedly. The reason is that invalid drm_file object could be accessed by send_vblank_event function when finishing page flip if the drm_file object was removed by drm_release and there was a pended page flip event which was already committed to hardware. So this patch makes the pended page flip event to be cancelled by preclose callback which is called at front of drm_release function. Changelog v2: - free vblank event objects belonging to the request process, increment event space and decrease pending_update when cancelling the event Signed-off-by: Inki Dae <inki.dae@samsung.com> Reviewed-by: Daniel Stone <daniels@collabora.com> Acked-by: Daniel Vetter <daniel@ffwll.ch>
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/* exynos_drm_crtc.h
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd.
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* Authors:
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* Inki Dae <inki.dae@samsung.com>
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* Joonyoung Shim <jy0922.shim@samsung.com>
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* Seung-Woo Kim <sw0312.kim@samsung.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#ifndef _EXYNOS_DRM_CRTC_H_
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#define _EXYNOS_DRM_CRTC_H_
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#include "exynos_drm_drv.h"
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struct exynos_drm_crtc *exynos_drm_crtc_create(struct drm_device *drm_dev,
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struct drm_plane *plane,
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int pipe,
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enum exynos_drm_output_type type,
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const struct exynos_drm_crtc_ops *ops,
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void *context);
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int exynos_drm_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe);
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void exynos_drm_crtc_disable_vblank(struct drm_device *dev, unsigned int pipe);
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void exynos_drm_crtc_wait_pending_update(struct exynos_drm_crtc *exynos_crtc);
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void exynos_drm_crtc_finish_update(struct exynos_drm_crtc *exynos_crtc,
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struct exynos_drm_plane *exynos_plane);
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/* This function gets pipe value to crtc device matched with out_type. */
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int exynos_drm_crtc_get_pipe_from_type(struct drm_device *drm_dev,
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enum exynos_drm_output_type out_type);
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/*
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* This function calls the crtc device(manager)'s te_handler() callback
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* to trigger to transfer video image at the tearing effect synchronization
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* signal.
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*/
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void exynos_drm_crtc_te_handler(struct drm_crtc *crtc);
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/* This function cancels a page flip request. */
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void exynos_drm_crtc_cancel_page_flip(struct drm_crtc *crtc,
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struct drm_file *file);
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#endif
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