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Subject[PATCH] drm/fb-helper: Add missed unlocks in setcmap_legacy()
Date
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>
---
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 1543d9d10970..8033467db4be 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -923,11 +923,15 @@ 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;
@@ -940,8 +944,9 @@ 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;
--
2.26.2
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