Since David Herrmann's mmap vma manager rework we don't need to grab
dev->struct_mutex any more to prevent races when looking up the mmap
offset. Drop it and instead don't forget to use the unref_unlocked
variant (since the drm core still cares).
While at it also fix a leak when this ioctl is called on an imported
buffer.
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/armada/armada_gem.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/armada/armada_gem.c b/drivers/gpu/drm/armada/armada_gem.c
index 580e10acaa3a..95df74227ec0 100644
--- a/drivers/gpu/drm/armada/armada_gem.c
+++ b/drivers/gpu/drm/armada/armada_gem.c
@@ -273,18 +273,16 @@ int armada_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
struct armada_gem_object *obj;
int ret = 0;
- mutex_lock(&dev->struct_mutex);
obj = armada_gem_object_lookup(dev, file, handle);
if (!obj) {
DRM_ERROR("failed to lookup gem object\n");
- ret = -EINVAL;
- goto err_unlock;
+ return -EINVAL;
}
/* Don't allow imported objects to be mapped */
if (obj->obj.import_attach) {
ret = -EINVAL;
- goto err_unlock;
+ goto err_unref;
}
ret = drm_gem_create_mmap_offset(&obj->obj);
@@ -293,9 +291,8 @@ int armada_gem_dumb_map_offset(struct drm_file *file, struct drm_device *dev,
DRM_DEBUG_DRIVER("handle %#x offset %llx\n", handle, *offset);
}
- drm_gem_object_unreference(&obj->obj);
- err_unlock:
- mutex_unlock(&dev->struct_mutex);
+err_unref:
+ drm_gem_object_unreference_unlocked(&obj->obj);
return ret;
}
--
2.1.4
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