drm_fb_helper_resume_worker() uses fb_helper->fbdev to call
fb_set_suspend() which dereferences the pointer.
Move sync-canceling of the resume worker in drm_fb_helper_fini() before
setting fb_helper->fbdev to NULL.
Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
---
drivers/gpu/drm/drm_fb_helper.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 1b8f013..2e33467 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -910,6 +910,8 @@ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
if (!drm_fbdev_emulation || !fb_helper)
return;
+ cancel_work_sync(&fb_helper->resume_work);
+
info = fb_helper->fbdev;
if (info) {
if (info->cmap.len)
@@ -918,7 +920,6 @@ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)
}
fb_helper->fbdev = NULL;
- cancel_work_sync(&fb_helper->resume_work);
cancel_work_sync(&fb_helper->dirty_work);
mutex_lock(&kernel_fb_helper_lock);
--
2.7.4
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