em38xx locking question

[Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>]

Mauro,

Function drivers/media/usb/em28xx/em28xx-video.c:get_next_buf
(copy pasted below for reference) does not take the list spinlock,
yet it modifies the list. Is that correct?

static inline struct em28xx_buffer *get_next_buf(struct em28xx *dev,
                                                 struct em28xx_dmaqueue *dma_q)
{
        struct em28xx_buffer *buf;

        if (list_empty(&dma_q->active)) {
                em28xx_isocdbg("No active queue to serve\n");
                return NULL;
        }
 
        /* Get the next buffer */
        buf = list_entry(dma_q->active.next, struct em28xx_buffer, list);
        /* Cleans up buffer - Useful for testing for frame/URB loss */
        list_del(&buf->list);
        buf->pos = 0; 
        buf->vb_buf = buf->mem;
 
        return buf;
}

Thanks!
-- 
Ezequiel Garcia, VanguardiaSur
www.vanguardiasur.com.ar