From: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
commit 63cb44441826e842b7285575b96db631cc9f2505 upstream.
This may confuse user-space clients like plymouth that opens a drm
file descriptor as a result of a hotplug event and then generates a
new event...
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 5ea1734827bb ("drm/vmwgfx: Send a hotplug event at master_set")
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Reviewed-by: Deepak Rawat <drawat@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1240,7 +1240,13 @@ static int vmw_master_set(struct drm_dev
}
dev_priv->active_master = vmaster;
- drm_sysfs_hotplug_event(dev);
+
+ /*
+ * Inform a new master that the layout may have changed while
+ * it was gone.
+ */
+ if (!from_open)
+ drm_sysfs_hotplug_event(dev);
return 0;
}
