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authorDave Airlie <airlied@redhat.com>2019-04-05 06:17:13 +0300
committerDave Airlie <airlied@redhat.com>2019-04-08 09:20:02 +0300
commit9b39b013037fbfa8d4b999345d9e904d8a336fc2 (patch)
tree303ac359547bf20530401a22ee0e42548449d202 /drivers/gpu
parent15ade5d2e7775667cf191cf2f94327a4889f8b9d (diff)
downloadlinux-9b39b013037fbfa8d4b999345d9e904d8a336fc2.tar.xz
drm/udl: add a release method and delay modeset teardown
If we unplug a udl device, the usb callback with deinit the mode_config struct, however userspace will still have an open file descriptor and a framebuffer on that device. When userspace closes the fd, we'll oops because it'll try and look stuff up in the object idr which we've destroyed. This punts destroying the mode objects until release time instead. Cc: stable@vger.kernel.org Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Dave Airlie <airlied@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190405031715.5959-2-airlied@gmail.com
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/udl/udl_drv.c1
-rw-r--r--drivers/gpu/drm/udl/udl_drv.h1
-rw-r--r--drivers/gpu/drm/udl/udl_main.c8
3 files changed, 9 insertions, 1 deletions
diff --git a/drivers/gpu/drm/udl/udl_drv.c b/drivers/gpu/drm/udl/udl_drv.c
index 22cd2d13e272..ff47f890e6ad 100644
--- a/drivers/gpu/drm/udl/udl_drv.c
+++ b/drivers/gpu/drm/udl/udl_drv.c
@@ -52,6 +52,7 @@ static struct drm_driver driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
.load = udl_driver_load,
.unload = udl_driver_unload,
+ .release = udl_driver_release,
/* gem hooks */
.gem_free_object_unlocked = udl_gem_free_object,
diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h
index e9e9b1ff678e..4ae67d882eae 100644
--- a/drivers/gpu/drm/udl/udl_drv.h
+++ b/drivers/gpu/drm/udl/udl_drv.h
@@ -104,6 +104,7 @@ void udl_urb_completion(struct urb *urb);
int udl_driver_load(struct drm_device *dev, unsigned long flags);
void udl_driver_unload(struct drm_device *dev);
+void udl_driver_release(struct drm_device *dev);
int udl_fbdev_init(struct drm_device *dev);
void udl_fbdev_cleanup(struct drm_device *dev);
diff --git a/drivers/gpu/drm/udl/udl_main.c b/drivers/gpu/drm/udl/udl_main.c
index 9086d0d1b880..1f8ef34ade24 100644
--- a/drivers/gpu/drm/udl/udl_main.c
+++ b/drivers/gpu/drm/udl/udl_main.c
@@ -379,6 +379,12 @@ void udl_driver_unload(struct drm_device *dev)
udl_free_urb_list(dev);
udl_fbdev_cleanup(dev);
- udl_modeset_cleanup(dev);
kfree(udl);
}
+
+void udl_driver_release(struct drm_device *dev)
+{
+ udl_modeset_cleanup(dev);
+ drm_dev_fini(dev);
+ kfree(dev);
+}