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drm: Move drm_mode_setcrtc() local re-init to failure path 

Instead of always re-initializing the variables we need to clean up on
out, move the re-initialization into the branch that goes back to retry
label.

This is a lateral move right now, but will allow us to pull out the
modeset locking into common code. I kept this change separate to make
things easier to review.

Changes in v2:
- None

Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20181129150423.239081-2-sean@poorly.run
This commit is contained in:
Sean Paul 2018-11-29 10:04:15 -05:00
parent aa394b0dd6
commit c232e9f41b
1 changed files with 9 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/gpu/drm/drm_crtc.c
View File

@ -570,9 +570,9 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
struct drm_mode_crtc *crtc_req = data;
struct drm_crtc *crtc;
struct drm_plane *plane;
struct drm_connector **connector_set, *connector;
struct drm_framebuffer *fb;
struct drm_display_mode *mode;
struct drm_connector **connector_set = NULL, *connector;
struct drm_framebuffer *fb = NULL;
struct drm_display_mode *mode = NULL;
struct drm_mode_set set;
uint32_t __user *set_connectors_ptr;
struct drm_modeset_acquire_ctx ctx;
@ -601,10 +601,6 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
mutex_lock(&crtc->dev->mode_config.mutex);
drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE);
retry:
connector_set = NULL;
fb = NULL;
mode = NULL;
ret = drm_modeset_lock_all_ctx(crtc->dev, &ctx);
if (ret)
goto out;
@ -766,6 +762,12 @@ out:
}
kfree(connector_set);
drm_mode_destroy(dev, mode);
/* In case we need to retry... */
connector_set = NULL;
fb = NULL;
mode = NULL;
if (ret == -EDEADLK) {
ret = drm_modeset_backoff(&ctx);
if (!ret)