From 58c0dca10614117cf4b385e3314e79e3b37fa66b Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Thu, 13 Dec 2012 23:06:08 +0100 Subject: [PATCH] drm: don't take modeset locks in getfb ioctl We only need to push the fb unreference a bit down. While at it, properly pass the return value from ->create_handle back to userspace. Most drivers either return -ENODEV if they don't have a concept of buffer objects (ast, cirrus, ...) or just install a handle for the underlying gem object (which is ok since we hold a reference on that through the framebuffer). v2: Split out the ->create_handle rework in the individual drivers. Reviewed-by: Rob Clark Signed-off-by: Daniel Vetter --- drivers/gpu/drm/drm_crtc.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 2e6103c5d632..cba8c8bb789c 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -2542,19 +2542,14 @@ int drm_mode_getfb(struct drm_device *dev, { struct drm_mode_fb_cmd *r = data; struct drm_framebuffer *fb; - int ret = 0; + int ret; if (!drm_core_check_feature(dev, DRIVER_MODESET)) return -EINVAL; - drm_modeset_lock_all(dev); fb = drm_framebuffer_lookup(dev, r->fb_id); - if (!fb) { - ret = -EINVAL; - goto out; - } - /* fb is protect by the mode_config lock, so drop the ref immediately */ - drm_framebuffer_unreference(fb); + if (!fb) + return -EINVAL; r->height = fb->height; r->width = fb->width; @@ -2566,8 +2561,8 @@ int drm_mode_getfb(struct drm_device *dev, else ret = -ENODEV; -out: - drm_modeset_unlock_all(dev); + drm_framebuffer_unreference(fb); + return ret; } -- 2.39.5