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authorMaarten Lankhorst <maarten.lankhorst@linux.intel.com>2015-11-11 11:29:10 +0100
committerJani Nikula <jani.nikula@intel.com>2015-11-17 13:02:14 +0200
commitf72c6b33edda439acff81a0da612f2bcd1f46f35 (patch)
tree008194388572c3ff7b594f06214a23b0406efc04 /drivers/gpu
parent0f45c26fc302c02b0576db37d4849baa53a2bb41 (diff)
downloadlinux-f72c6b33edda439acff81a0da612f2bcd1f46f35.tar.bz2
drm/core: Fix old_fb handling in restore_fbdev_mode_atomic.
Don't touch plane->old_fb/fb without having the right locks held. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1447237751-9663-5-git-send-email-maarten.lankhorst@ubuntu.com
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/drm_fb_helper.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index e673c13c7391..abd50863506e 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -342,6 +342,7 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper)
struct drm_plane *plane;
struct drm_atomic_state *state;
int i, ret;
+ unsigned plane_mask;
state = drm_atomic_state_alloc(dev);
if (!state)
@@ -349,11 +350,10 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper)
state->acquire_ctx = dev->mode_config.acquire_ctx;
retry:
+ plane_mask = 0;
drm_for_each_plane(plane, dev) {
struct drm_plane_state *plane_state;
- plane->old_fb = plane->fb;
-
plane_state = drm_atomic_get_plane_state(state, plane);
if (IS_ERR(plane_state)) {
ret = PTR_ERR(plane_state);
@@ -362,6 +362,9 @@ retry:
plane_state->rotation = BIT(DRM_ROTATE_0);
+ plane->old_fb = plane->fb;
+ plane_mask |= 1 << drm_plane_index(plane);
+
/* disable non-primary: */
if (plane->type == DRM_PLANE_TYPE_PRIMARY)
continue;
@@ -382,19 +385,7 @@ retry:
ret = drm_atomic_commit(state);
fail:
- drm_for_each_plane(plane, dev) {
- if (ret == 0) {
- struct drm_framebuffer *new_fb = plane->state->fb;
- if (new_fb)
- drm_framebuffer_reference(new_fb);
- plane->fb = new_fb;
- plane->crtc = plane->state->crtc;
-
- if (plane->old_fb)
- drm_framebuffer_unreference(plane->old_fb);
- }
- plane->old_fb = NULL;
- }
+ drm_atomic_clean_old_fb(dev, plane_mask, ret);
if (ret == -EDEADLK)
goto backoff;