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| author | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2014-12-17 14:34:22 +0200 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2015-03-24 13:50:58 +0200 |
| commit | 76c4055f2c9a7ae556e96c1cadd82ee182b7d87e (patch) | |
| tree | e9464ef16dd2638e6cc56a7d49f7eef34eda3bdd /drivers/gpu/drm/omapdrm/omap_drv.c | |
| parent | 8519c62ce610e512722d1d8e3991c02cca59010c (diff) | |
| download | linux-rt-76c4055f2c9a7ae556e96c1cadd82ee182b7d87e.tar.gz | |
drm/omap: fix race condition with dev->obj_list
omap_gem_objects are added to dev->obj_list in omap_gem_new, and removed
in omap_gem_free_object. Unfortunately there's no locking for
dev->obj_list, which eventually leads to a crash:
WARNING: CPU: 1 PID: 1123 at lib/list_debug.c:59 __list_del_entry+0xa4/0xe0()
list_del corruption. prev->next should be e9281344, but was ea722b84
Add a spinlock to protect dev->obj_list.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/gpu/drm/omapdrm/omap_drv.c')
| -rw-r--r-- | drivers/gpu/drm/omapdrm/omap_drv.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c index c4c237317901..c6980985884b 100644 --- a/drivers/gpu/drm/omapdrm/omap_drv.c +++ b/drivers/gpu/drm/omapdrm/omap_drv.c @@ -491,6 +491,7 @@ static int dev_load(struct drm_device *dev, unsigned long flags) priv->wq = alloc_ordered_workqueue("omapdrm", 0); + spin_lock_init(&priv->list_lock); INIT_LIST_HEAD(&priv->obj_list); omap_gem_init(dev); |