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drm: eliminate old_fb from drm_crtc_helper_set_config 

Old framebuffer is stored in save_set.fb and it is
the same value that is later stored in old_fb.
This makes old_fb redundant so we can replace
it with save_set.fb.

Signed-off-by: Ilija Hadzic <ihadzic@research.bell-labs.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Ilija Hadzic 2013-10-29 11:09:42 -04:00 committed by Dave Airlie
parent fc50a890df
commit bec2eac3a4
1 changed files with 4 additions and 8 deletions
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12
drivers/gpu/drm/drm_crtc_helper.c
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@ -603,7 +603,6 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
struct drm_device *dev;
struct drm_crtc *save_crtcs, *new_crtc, *crtc;
struct drm_encoder *save_encoders, *new_encoder, *encoder;
struct drm_framebuffer *old_fb = NULL;
bool mode_changed = false; /* if true do a full mode set */
bool fb_changed = false; /* if true and !mode_changed just do a flip */
struct drm_connector *save_connectors, *connector;
@ -798,14 +797,13 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
DRM_DEBUG_KMS("attempting to set mode from"
" userspace\n");
drm_mode_debug_printmodeline(set->mode);
old_fb = set->crtc->fb;
set->crtc->fb = set->fb;
if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
set->x, set->y,
old_fb)) {
save_set.fb)) {
DRM_ERROR("failed to set mode on [CRTC:%d]\n",
set->crtc->base.id);
set->crtc->fb = old_fb;
set->crtc->fb = save_set.fb;
ret = -EINVAL;
goto fail;
}
@ -820,13 +818,11 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
} else if (fb_changed) {
set->crtc->x = set->x;
set->crtc->y = set->y;
old_fb = set->crtc->fb;
set->crtc->fb = set->fb;
ret = crtc_funcs->mode_set_base(set->crtc,
set->x, set->y, old_fb);
set->x, set->y, save_set.fb);
if (ret != 0) {
set->crtc->fb = old_fb;
set->crtc->fb = save_set.fb;
goto fail;
}
}