Linux Virtualization - Jul 2019 - [PATCH AUTOSEL 5.2 009/171] drm/bochs: Fix connector leak during driver unload

From: Sam Bobroff <sbobroff at linux.ibm.com>

[ Upstream commit 3c6b8625dde82600fd03ad1fcba223f1303ee535 ]

When unloading the bochs-drm driver, a warning message is printed by
drm_mode_config_cleanup() because a reference is still held to one of
the drm_connector structs.

Correct this by calling drm_atomic_helper_shutdown() in
bochs_pci_remove().

Fixes: 6579c39594ae ("drm/bochs: atomic: switch planes to atomic, wire up
helpers.")
Signed-off-by: Sam Bobroff <sbobroff at linux.ibm.com>
Link:
http://patchwork.freedesktop.org/patch/msgid/93b363ad62f4938d9ddf3e05b2a61e3f66b2dcd3.1558416473.git.sbobroff
at linux.ibm.com
Signed-off-by: Gerd Hoffmann <kraxel at redhat.com>
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/gpu/drm/bochs/bochs_drv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/bochs/bochs_drv.c
b/drivers/gpu/drm/bochs/bochs_drv.c
index b86cc705138c..d8b945596b09 100644
--- a/drivers/gpu/drm/bochs/bochs_drv.c
+++ b/drivers/gpu/drm/bochs/bochs_drv.c
@@ -7,6 +7,7 @@
 #include <linux/slab.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/drm_atomic_helper.h>
 
 #include "bochs.h"
 
@@ -171,6 +172,7 @@ static void bochs_pci_remove(struct pci_dev *pdev)
 {
 	struct drm_device *dev = pci_get_drvdata(pdev);
 
+	drm_atomic_helper_shutdown(dev);
 	drm_dev_unregister(dev);
 	bochs_unload(dev);
 	drm_dev_put(dev);
-- 
2.20.1