Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 48/83] drm/vmwgfx: Dont send drm sysfs hotplug events on initial master set | Date | Sun, 9 Jun 2019 18:42:18 +0200 |
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From: Thomas Hellstrom <thellstrom@vmware.com>
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@vger.kernel.org> Fixes: 5ea1734827bb ("drm/vmwgfx: Send a hotplug event at master_set") Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Deepak Rawat <drawat@vmware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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 @@ -1245,7 +1245,13 @@ 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; }
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