fsldma: Fix cookie issues

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / dma / fsldma.c

diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index 6541ebf8bf6388992f4db171d500dbca481c55f3..bbb4be5a3ff493be3bf35ac07474e43002efd71d 100644 (file)
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -819,8 +819,11 @@ static void fsl_dma_update_completed_cookie(struct fsldma_chan *chan)
        desc = to_fsl_desc(chan->ld_running.prev);
        if (dma_is_idle(chan))
                cookie = desc->async_tx.cookie;
-       else
+       else {
                cookie = desc->async_tx.cookie - 1;
+               if (unlikely(cookie < DMA_MIN_COOKIE))
+                       cookie = DMA_MAX_COOKIE;
+       }
 
        chan->completed_cookie = cookie;