diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 78219752dd0..dff205849b3 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -640,12 +640,19 @@ static int setcolreg(struct drm_crtc *crtc, u16 red, u16 green, int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; + struct drm_device *dev = fb_helper->dev; struct drm_crtc_helper_funcs *crtc_funcs; u16 *red, *green, *blue, *transp; struct drm_crtc *crtc; int i, j, rc = 0; int start; + drm_modeset_lock_all(dev); + if (!drm_fb_helper_is_bound(fb_helper)) { + drm_modeset_unlock_all(dev); + return -EBUSY; + } + for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; crtc_funcs = crtc->helper_private; @@ -668,10 +675,12 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) rc = setcolreg(crtc, hred, hgreen, hblue, start++, info); if (rc) - return rc; + goto out; } crtc_funcs->load_lut(crtc); } + out: + drm_modeset_unlock_all(dev); return rc; } EXPORT_SYMBOL(drm_fb_helper_setcmap); |