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<p class="MsoNormal"><span style="color:black">How about add a return value for the function amdgpu_vm_pt_next?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black">And change the code as:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> <o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"> ret = amdgpu_vm_pt_next(adev, cursor);<br>
- while (amdgpu_vm_pt_descendant(adev, cursor));<br>
+ if (!ret)<br>
+ while (amdgpu_vm_pt_descendant(adev, cursor));</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best Regards<o:p></o:p></p>
<p class="MsoNormal">Rex<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> amd-gfx <amd-gfx-bounces@lists.freedesktop.org>
<b>On Behalf Of </b>Zhu, Rex<br>
<b>Sent:</b> Thursday, October 25, 2018 11:34 PM<br>
<b>To:</b> Deucher, Alexander <Alexander.Deucher@amd.com>; Christian König <ckoenig.leichtzumerken@gmail.com>; amd-gfx@lists.freedesktop.org<br>
<b>Subject:</b> RE: [PATCH] drm/amdgpu: fix VM leaf walking<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Patch is Tested-by: Rex Zhu <a href="mailto:Rex.Zhu@amd.com">
Rex.Zhu@amd.com</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards<o:p></o:p></p>
<p class="MsoNormal">Rex<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> amd-gfx <<a href="mailto:amd-gfx-bounces@lists.freedesktop.org">amd-gfx-bounces@lists.freedesktop.org</a>>
<b>On Behalf Of </b>Deucher, Alexander<br>
<b>Sent:</b> Thursday, October 25, 2018 11:08 PM<br>
<b>To:</b> Christian König <<a href="mailto:ckoenig.leichtzumerken@gmail.com">ckoenig.leichtzumerken@gmail.com</a>>;
<a href="mailto:amd-gfx@lists.freedesktop.org">amd-gfx@lists.freedesktop.org</a><br>
<b>Subject:</b> Re: [PATCH] drm/amdgpu: fix VM leaf walking<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p><span style="font-size:12.0pt;color:black">Acked-by: Alex Deucher <<a href="mailto:alexander.deucher@amd.com">alexander.deucher@amd.com</a>><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From:</span></b><span style="color:black"> amd-gfx <<a href="mailto:amd-gfx-bounces@lists.freedesktop.org">amd-gfx-bounces@lists.freedesktop.org</a>> on behalf of Christian König <<a href="mailto:ckoenig.leichtzumerken@gmail.com">ckoenig.leichtzumerken@gmail.com</a>><br>
<b>Sent:</b> Thursday, October 25, 2018 10:38 AM<br>
<b>To:</b> <a href="mailto:amd-gfx@lists.freedesktop.org">amd-gfx@lists.freedesktop.org</a><br>
<b>Subject:</b> [PATCH] drm/amdgpu: fix VM leaf walking</span><span style="font-size:12.0pt;color:black">
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Make sure we don't try to go down further after the leave walk already<br>
ended. This fixes a crash with a new VM test.<br>
<br>
Signed-off-by: Christian König <<a href="mailto:christian.koenig@amd.com">christian.koenig@amd.com</a>><br>
---<br>
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 ++-<br>
1 file changed, 2 insertions(+), 1 deletion(-)<br>
<br>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c<br>
index db0cbf8d219d..352b30409060 100644<br>
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c<br>
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c<br>
@@ -542,7 +542,8 @@ static void amdgpu_vm_pt_next_leaf(struct amdgpu_device *adev,<br>
struct amdgpu_vm_pt_cursor *cursor)<br>
{<br>
amdgpu_vm_pt_next(adev, cursor);<br>
- while (amdgpu_vm_pt_descendant(adev, cursor));<br>
+ if (cursor->pfn != ~0ll)<br>
+ while (amdgpu_vm_pt_descendant(adev, cursor));<br>
}<br>
<br>
/**<br>
-- <br>
2.17.1<br>
<br>
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