dmaengine: rcar-dmac: Fixed active descriptor initializing

Running descriptor pointer is set to NULL upon freeing resources. Other-
wise, rcar_dmac_issue_pending might not start new transfers

Signed-off-by: Muhammad Hamza Farooq <mfarooq@visteon.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index 72e7dab52c48..561476c1e741 100644
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -990,6 +990,8 @@ static void rcar_dmac_free_chan_resources(struct dma_chan *chan)
         list_splice_init(&rchan->desc.done, &list);
         list_splice_init(&rchan->desc.wait, &list);
 
+        rchan->desc.running = NULL;
+
         list_for_each_entry(desc, &list, node)
                 rcar_dmac_realloc_hwdesc(rchan, desc, 0);