This is a note to let you know that I've just added the patch titled
drm/vmwgfx: Fix vmw_du_get_cursor_mob fencing of newly-created MOBs
to the 6.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-vmwgfx-fix-vmw_du_get_cursor_mob-fencing-of-newl.patch
and it can be found in the queue-6.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 362624ecf232fda5e22dbcf311ec2caae35547ec
Author: Martin Krastev <martin.krastev@xxxxxxxxxxxx>
Date: Fri Jan 26 15:08:03 2024 -0500
drm/vmwgfx: Fix vmw_du_get_cursor_mob fencing of newly-created MOBs
[ Upstream commit ed96cf7ad590989b009d6da5cd26387d995dac13 ]
The fencing of MOB creation used in vmw_du_get_cursor_mob was incompatible
with register-based device communication employed by this routine. As a
result cursor MOB creation was racy, leading to potentially broken/missing
mouse cursor on desktops using CursorMob device feature.
Fixes: 53bc3f6fb6b3 ("drm/vmwgfx: Clean up cursor mobs")
Signed-off-by: Martin Krastev <martin.krastev@xxxxxxxxxxxx>
Reviewed-by: Maaz Mombasawala <maaz.mombasawala@xxxxxxxxxxxx>
Reviewed-by: Zack Rusin <zack.rusin@xxxxxxxxxxxx>
Signed-off-by: Zack Rusin <zack.rusin@xxxxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240126200804.732454-5-zack.rusin@xxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 5fd0ccaa0b41b..b6f40781b907a 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -272,6 +272,7 @@ static int vmw_du_get_cursor_mob(struct vmw_cursor_plane *vcp,
u32 size = vmw_du_cursor_mob_size(vps->base.crtc_w, vps->base.crtc_h);
u32 i;
u32 cursor_max_dim, mob_max_size;
+ struct vmw_fence_obj *fence = NULL;
int ret;
if (!dev_priv->has_mob ||
@@ -313,7 +314,15 @@ static int vmw_du_get_cursor_mob(struct vmw_cursor_plane *vcp,
if (ret != 0)
goto teardown;
- vmw_bo_fence_single(&vps->cursor.bo->tbo, NULL);
+ ret = vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
+ if (ret != 0) {
+ ttm_bo_unreserve(&vps->cursor.bo->tbo);
+ goto teardown;
+ }
+
+ dma_fence_wait(&fence->base, false);
+ dma_fence_put(&fence->base);
+
ttm_bo_unreserve(&vps->cursor.bo->tbo);
return 0;
