47 lines
1.5 KiB
Diff
47 lines
1.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Zhipeng Gong <zhipeng.gong@intel.com>
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Date: Tue, 23 Oct 2018 16:36:52 +0800
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Subject: [PATCH] drm/i915/gvt: fix kernel panic for gvtbuffer
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The obj created in i915_gem_object_create_gvtbuffer does not init
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obj->mm.link. when __i915_gem_free_objects call
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list_del_init(&obj->mm.link), it causes kernel panic.
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This patch fix it by add obj->mm.link to unbound list.
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Tracked-On: projectacrn/acrn-hypervisor#1576
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Signed-off-by: Zhipeng Gong <zhipeng.gong@intel.com>
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Reviewed-by: He, Min <min.he@intel.com>
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---
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drivers/gpu/drm/i915/i915_gem_gvtbuffer.c | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/drivers/gpu/drm/i915/i915_gem_gvtbuffer.c b/drivers/gpu/drm/i915/i915_gem_gvtbuffer.c
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index f482eceb5c7f..6e58fa1fb1d2 100644
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--- a/drivers/gpu/drm/i915/i915_gem_gvtbuffer.c
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+++ b/drivers/gpu/drm/i915/i915_gem_gvtbuffer.c
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@@ -115,6 +115,8 @@ i915_gem_object_create_gvtbuffer(struct drm_device *dev,
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u32 start, u32 num_pages)
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{
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struct drm_i915_gem_object *obj;
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+ struct drm_i915_private *i915 = to_i915(dev);
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+
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obj = i915_gem_object_alloc(to_i915(dev));
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if (obj == NULL)
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return NULL;
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@@ -134,6 +136,11 @@ i915_gem_object_create_gvtbuffer(struct drm_device *dev,
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DRM_DEBUG_DRIVER("GVT_GEM: backing store base = 0x%x pages = 0x%x\n",
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start, num_pages);
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+
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+ spin_lock(&i915->mm.obj_lock);
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+ list_add(&obj->mm.link, &i915->mm.unbound_list);
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+ spin_unlock(&i915->mm.obj_lock);
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+
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return obj;
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}
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--
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https://clearlinux.org
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