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Acked-by: Alex Deucher <alexander.deucher@amd.com><br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> amd-gfx <amd-gfx-bounces@lists.freedesktop.org> on behalf of HaiJun Chang <HaiJun.Chang@amd.com><br>
<b>Sent:</b> Tuesday, October 29, 2019 5:18 AM<br>
<b>To:</b> amd-gfx@lists.freedesktop.org <amd-gfx@lists.freedesktop.org><br>
<b>Cc:</b> Chang, HaiJun <HaiJun.Chang@amd.com><br>
<b>Subject:</b> [PATCH] drm/amdgpu: fix gfx VF FLR test fail on navi</font>
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<div class="PlainText">Cp wptr in wb buffer is outdated after VF FLR.<br>
The outdated wptr may cause cp to execute unexpected packets.<br>
Reset cp wptr in wb buffer.<br>
<br>
Signed-off-by: HaiJun Chang <HaiJun.Chang@amd.com><br>
---<br>
drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 1 +<br>
1 file changed, 1 insertion(+)<br>
<br>
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c<br>
index d126d66..13363f2 100644<br>
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c<br>
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c<br>
@@ -3107,6 +3107,7 @@ static int gfx_v10_0_gfx_init_queue(struct amdgpu_ring *ring)<br>
memcpy(mqd, adev->gfx.me.mqd_backup[AMDGPU_MAX_GFX_RINGS], sizeof(*mqd));<br>
/* reset the ring */<br>
ring->wptr = 0;<br>
+ adev->wb.wb[ring->wptr_offs] = 0;<br>
amdgpu_ring_clear_ring(ring);<br>
#ifdef BRING_UP_DEBUG<br>
mutex_lock(&adev->srbm_mutex);<br>
-- <br>
2.7.4<br>
<br>
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