dmaengine: shdma: restore partial transfer calculation

The recent shdma driver split has mistakenly removed support for partial
DMA transfer size calculation on forced termination. This patch restores
it.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Acked-by: Vinod Koul <vinod.koul@linux.intel.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c
index 27f5c781fd73..f4cd946d259d 100644
--- a/drivers/dma/sh/shdma-base.c
+++ b/drivers/dma/sh/shdma-base.c
@@ -483,6 +483,7 @@ static struct shdma_desc *shdma_add_desc(struct shdma_chan *schan,
         new->mark = DESC_PREPARED;
         new->async_tx.flags = flags;
         new->direction = direction;
+        new->partial = 0;
 
         *len -= copy_size;
         if (direction == DMA_MEM_TO_MEM || direction == DMA_MEM_TO_DEV)
@@ -644,6 +645,14 @@ static int shdma_control(struct dma_chan *chan, enum dma_ctrl_cmd cmd,
         case DMA_TERMINATE_ALL:
                 spin_lock_irqsave(&schan->chan_lock, flags);
                 ops->halt_channel(schan);
+
+                if (ops->get_partial && !list_empty(&schan->ld_queue)) {
+                        /* Record partial transfer */
+                        struct shdma_desc *desc = list_first_entry(&schan->ld_queue,
+                                                struct shdma_desc, node);
+                        desc->partial = ops->get_partial(schan, desc);
+                }
+
                 spin_unlock_irqrestore(&schan->chan_lock, flags);
 
                 shdma_chan_ld_cleanup(schan, true);