[PATCH] vim2m: use cancel_delayed_work_sync instead of flush_schedule_work

[Hans Verkuil]

The use of flush_schedule_work() made no sense and caused a syzkaller error.
Replace with the correct cancel_delayed_work_sync().

Signed-off-by: Hans Verkuil <hans.verkuil>
Reported-by: syzbot+69780d144754b8071...@syzkaller.appspotmail.com
---
diff --git a/drivers/media/platform/vim2m.c b/drivers/media/platform/vim2m.c
index d82db738f174..f938a2c54314 100644
--- a/drivers/media/platform/vim2m.c
+++ b/drivers/media/platform/vim2m.c
@@ -805,10 +805,11 @@ static int vim2m_start_streaming(struct vb2_queue *q, 
unsigned count)
 static void vim2m_stop_streaming(struct vb2_queue *q)
 {
        struct vim2m_ctx *ctx = vb2_get_drv_priv(q);
+       struct vim2m_dev *dev = ctx->dev;
        struct vb2_v4l2_buffer *vbuf;
        unsigned long flags;

-       flush_scheduled_work();
+       cancel_delayed_work_sync(&dev->work_run);
        for (;;) {
                if (V4L2_TYPE_IS_OUTPUT(q->type))
                        vbuf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);