From: Xiong Zhang Date: Mon, 5 Mar 2018 22:07:28 +0000 (+0800) Subject: drm/i915/gvt: Return error at the failure of finding page_track X-Git-Tag: v4.17-rc1~185^2~14^2~1^2 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=991ecefbdd4b81719597d6c406df8d26ef5c1546;p=thirdparty%2Flinux.git drm/i915/gvt: Return error at the failure of finding page_track In XenGT, ioreq copy is used to trap mmio write and ppgtt write. Both of them are memory write, ioreq handler couldn't distinguish them. So ioreq handler probe the ppgtt write handler, if it is succuess, this ioreq is ppgtt write, otherwise it is mmio write. So ppgtt write handler should return an error at the failure of finding page track, it is fatal to implement ioreq handler in XenGT. Signed-off-by: Xiong Zhang Signed-off-by: Zhenyu Wang --- diff --git a/drivers/gpu/drm/i915/gvt/page_track.c b/drivers/gpu/drm/i915/gvt/page_track.c index 2d030545356b7..53e2bd79c97d9 100644 --- a/drivers/gpu/drm/i915/gvt/page_track.c +++ b/drivers/gpu/drm/i915/gvt/page_track.c @@ -164,8 +164,10 @@ int intel_vgpu_page_track_handler(struct intel_vgpu *vgpu, u64 gpa, mutex_lock(&gvt->lock); page_track = intel_vgpu_find_page_track(vgpu, gpa >> PAGE_SHIFT); - if (!page_track) + if (!page_track) { + ret = -ENXIO; goto out; + } if (unlikely(vgpu->failsafe)) { /* Remove write protection to prevent furture traps. */