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From: Thomas Hellstrom <thellstrom@vmware.com>
To: "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>
Cc: Thomas Hellstrom <thellstrom@vmware.com>,
	"stable@vger.kernel.org" <stable@vger.kernel.org>,
	Deepak Singh Rawat <drawat@vmware.com>
Subject: [PATCH 1/6] drm/vmwgfx: Don't send drm sysfs hotplug events on initial master set
Date: Tue, 21 May 2019 08:24:20 +0000
Message-ID: <20190521082345.27286-1-thellstrom@vmware.com> (raw)

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>
---
 drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index bf6c3500d363..4ff11a0077e1 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -1239,7 +1239,13 @@ static int vmw_master_set(struct drm_device *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;
 }
-- 
2.20.1


             reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-21  8:24 Thomas Hellstrom [this message]
2019-05-21  8:24 ` [PATCH 2/6] drm/vmwgfx: Fix user space handle equal to zero Thomas Hellstrom
2019-05-21  8:24 ` [PATCH 3/6] drm/vmwgfx: Fix compat mode shader operation Thomas Hellstrom
2019-05-21  8:25 ` [PATCH 5/6] drm/vmwgfx: NULL pointer dereference from vmw_cmd_dx_view_define() Thomas Hellstrom
2019-05-21  8:25 ` [PATCH 6/6] drm/vmwgfx: integer underflow in vmw_cmd_dx_set_shader() leading to an invalid read Thomas Hellstrom

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