[PATCH 07/15] drm/mode: reduce scope of fb_lock in framebuffer init

[Dave Airlie]

From: Dave Airlie <airl...@redhat.com>

We don't need to hold the fb lock around the initialisation,
only around the list manipulaton.

So do the lock hold only around the register for now.
Signed-off-by: Dave Airlie <airlied at redhat.com>
---
 drivers/gpu/drm/drm_crtc.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 0d75517..1863879 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -458,21 +458,22 @@ int drm_framebuffer_init(struct drm_device *dev, struct 
drm_framebuffer *fb,
 {
        int ret;

-       mutex_lock(&dev->mode_config.fb_lock);
        INIT_LIST_HEAD(&fb->filp_head);
        fb->dev = dev;
        fb->funcs = funcs;

        ret = drm_mode_object_get_reg(dev, &fb->base, DRM_MODE_OBJECT_FB,
-                                     true, drm_framebuffer_free);
+                                     false, drm_framebuffer_free);
        if (ret)
                goto out;

+       mutex_lock(&dev->mode_config.fb_lock);
        dev->mode_config.num_fb++;
        list_add(&fb->head, &dev->mode_config.fb_list);
-out:
-       mutex_unlock(&dev->mode_config.fb_lock);

+       drm_mode_object_register(dev, &fb->base);
+       mutex_unlock(&dev->mode_config.fb_lock);
+out:
        return ret;
 }
 EXPORT_SYMBOL(drm_framebuffer_init);
-- 
2.5.5