From 6374f68cf3f6f45448ad1afd14f5c6e0c542f544 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@ffwll.ch>
Date: Mon, 23 Mar 2020 15:49:03 +0100
Subject: drm: Set final_kfree in drm_dev_alloc
Git-commit: 6f365e561d66553d09b832378a45d3dee5be24e1
Patch-mainline: v5.8-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
I also did a full review of all callers, and only the xen driver
forgot to call drm_dev_put in the failure path. Fix that up too.
v2: I noticed that xen has a drm_driver.release hook, and uses
drm_dev_alloc(). We need to remove the kfree from
xen_drm_drv_release().
bochs also has a release hook, but leaked the drm_device ever since
commit 0a6659bdc5e8221da99eebb176fd9591435e38de
Author: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue Dec 17 18:04:46 2013 +0100
drm/bochs: new driver
This patch here fixes that leak.
Same for virtio, started leaking with
commit b1df3a2b24a917f8853d43fe9683c0e360d2c33a
Author: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue Feb 11 14:58:04 2020 +0100
drm/virtio: add drm_driver.release callback.
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Cc: xen-devel@lists.xenproject.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Cc: xen-devel@lists.xenproject.org
Link: https://patchwork.freedesktop.org/patch/msgid/20200323144950.3018436-5-daniel.vetter@ffwll.ch
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/drm_drv.c | 3 +++
drivers/gpu/drm/xen/xen_drm_front.c | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index a1884005d983..b75cadac1e8c 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -39,6 +39,7 @@
#include <drm/drm_color_mgmt.h>
#include <drm/drm_drv.h>
#include <drm/drm_file.h>
+#include <drm/drm_managed.h>
#include <drm/drm_mode_object.h>
#include <drm/drm_print.h>
@@ -819,6 +820,8 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver,
return ERR_PTR(ret);
}
+ drmm_add_final_kfree(dev, dev);
+
return dev;
}
EXPORT_SYMBOL(drm_dev_alloc);
diff --git a/drivers/gpu/drm/xen/xen_drm_front.c b/drivers/gpu/drm/xen/xen_drm_front.c
index 374142018171..78a917f4fb6a 100644
--- a/drivers/gpu/drm/xen/xen_drm_front.c
+++ b/drivers/gpu/drm/xen/xen_drm_front.c
@@ -461,7 +461,6 @@ static void xen_drm_drv_release(struct drm_device *dev)
drm_mode_config_cleanup(dev);
drm_dev_fini(dev);
- kfree(dev);
if (front_info->cfg.be_alloc)
xenbus_switch_state(front_info->xb_dev,
@@ -561,6 +560,7 @@ static int xen_drm_drv_init(struct xen_drm_front_info *front_info)
fail_modeset:
drm_kms_helper_poll_fini(drm_dev);
drm_mode_config_cleanup(drm_dev);
+ drm_dev_put(drm_dev);
fail:
kfree(drm_info);
return ret;
--
2.28.0