From: Chuhong Yuan hslester96@gmail.com
[ Upstream commit 0a260e731d6c4c17547ac275a2cde888a9eb4a3d ]
setcmap_legacy() does not call drm_modeset_unlock_all() in some exits, add the missed unlocks with goto to fix it.
Fixes: 964c60063bff ("drm/fb-helper: separate the fb_setcmap helper into atomic and legacy paths") Signed-off-by: Chuhong Yuan hslester96@gmail.com Signed-off-by: Daniel Vetter daniel.vetter@ffwll.ch Link: https://patchwork.freedesktop.org/patch/msgid/20201203144248.418281-1-hslest... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/drm_fb_helper.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 6b8502bcf0fd3..02ffde5fd7226 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -965,11 +965,15 @@ static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info) drm_modeset_lock_all(fb_helper->dev); drm_client_for_each_modeset(modeset, &fb_helper->client) { crtc = modeset->crtc; - if (!crtc->funcs->gamma_set || !crtc->gamma_size) - return -EINVAL; + if (!crtc->funcs->gamma_set || !crtc->gamma_size) { + ret = -EINVAL; + goto out; + }
- if (cmap->start + cmap->len > crtc->gamma_size) - return -EINVAL; + if (cmap->start + cmap->len > crtc->gamma_size) { + ret = -EINVAL; + goto out; + }
r = crtc->gamma_store; g = r + crtc->gamma_size; @@ -982,8 +986,9 @@ static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info) ret = crtc->funcs->gamma_set(crtc, r, g, b, crtc->gamma_size, NULL); if (ret) - return ret; + goto out; } +out: drm_modeset_unlock_all(fb_helper->dev);
return ret;