dmaengine: hsu: Support dmaengine_terminate_sync()

It appears that the driver misses the support of dmaengine_terminate_sync().
Since many of callers expects this behaviour implement the new
device_synchronize() callback to allow proper synchronization when stopping
a channel.

Fixes: b36f09c3c441 ("dmaengine: Add transfer termination synchronization support")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c
index 29d04ca..202ffa9 100644 (file)
--- a/drivers/dma/hsu/hsu.c
+++ b/drivers/dma/hsu/hsu.c
@@ -413,6 +413,13 @@ static void hsu_dma_free_chan_resources(struct dma_chan *chan)
        vchan_free_chan_resources(to_virt_chan(chan));
 }
 
+static void hsu_dma_synchronize(struct dma_chan *chan)
+{
+       struct hsu_dma_chan *hsuc = to_hsu_dma_chan(chan);
+
+       vchan_synchronize(&hsuc->vchan);
+}
+
 int hsu_dma_probe(struct hsu_dma_chip *chip)
 {
        struct hsu_dma *hsu;
@@ -459,6 +466,7 @@ int hsu_dma_probe(struct hsu_dma_chip *chip)
        hsu->dma.device_pause = hsu_dma_pause;
        hsu->dma.device_resume = hsu_dma_resume;
        hsu->dma.device_terminate_all = hsu_dma_terminate_all;
+       hsu->dma.device_synchronize = hsu_dma_synchronize;
 
        hsu->dma.src_addr_widths = HSU_DMA_BUSWIDTHS;
        hsu->dma.dst_addr_widths = HSU_DMA_BUSWIDTHS;