[PATCH] drm/i915/gvt: Fix an logic issue in ppgtt_allocate_oos_page
Zhi Wang
zhi.a.wang at intel.com
Sat Apr 1 05:05:14 UTC 2017
Please take this one. :P Thanks. I forget to change the author in the
previous patch after re-basing it to staging branch.
On 04/01/17 13:04, Zhi Wang wrote:
> From: Min He <min.he at intel.com>
>
> In ppgtt_allocate_oos_page, when there's no free oos_page, we'll sync an
> old oos page and detach it. But that oos page may not belong to current
> gvt, so we need to find corresponding gvt and sync to it.
>
> Fixes: 2707e44 ("drm/i915/gvt: vGPU graphics memory virtualization")
> Signed-off-by: Min He <min.he at intel.com>
> Signed-off-by: Zhi Wang <zhi.a.wang at intel.com>
> ---
> drivers/gpu/drm/i915/gvt/gtt.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
> index 6da4e44..cb13bc7 100644
> --- a/drivers/gpu/drm/i915/gvt/gtt.c
> +++ b/drivers/gpu/drm/i915/gvt/gtt.c
> @@ -1160,6 +1160,7 @@ static int ppgtt_allocate_oos_page(struct intel_vgpu *vgpu,
> struct intel_gvt *gvt = vgpu->gvt;
> struct intel_gvt_gtt *gtt = &gvt->gtt;
> struct intel_vgpu_oos_page *oos_page = gpt->oos_page;
> + struct intel_vgpu_ppgtt_spt *spt = NULL;
> int ret;
>
> WARN(oos_page, "shadow PPGTT page has already has a oos page\n");
> @@ -1167,10 +1168,12 @@ static int ppgtt_allocate_oos_page(struct intel_vgpu *vgpu,
> if (list_empty(>t->oos_page_free_list_head)) {
> oos_page = container_of(gtt->oos_page_use_list_head.next,
> struct intel_vgpu_oos_page, list);
> - ret = ppgtt_set_guest_page_sync(vgpu, oos_page->guest_page);
> + spt = guest_page_to_ppgtt_spt(oos_page->guest_page);
> + ret = ppgtt_set_guest_page_sync(spt->vgpu,
> + oos_page->guest_page);
> if (ret)
> return ret;
> - ret = detach_oos_page(vgpu, oos_page);
> + ret = detach_oos_page(spt->vgpu, oos_page);
> if (ret)
> return ret;
> } else
>
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