dmaengine: k3dma: fix non-cyclic mode

Commit 36387a2b1f62b5c087c5fe6f0f7b23b94f722ad7 ("k3dma: Fix
memory handling in preparation for cyclic mode") broke the
logic around ds_run/ds_done in case of non-cyclic DMA.

This went unnoticed as the only user of k3dma was the i2s
audio driver but, with a patch set to enable dma on SPI, the
issue popped out.

The fix re-applies the initialization to ds_run/ds_done in
k3_dma_start_txd() that were removed by the commit above.

Also, one of the calls to k3_dma_start_txd() is triggered by
(ds_done != NULL), so remove the noisy and useless call to
WARN_ON_ONCE().

Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
index 01e25c6..c00eb12 100644 (file)
--- a/drivers/dma/k3dma.c
+++ b/drivers/dma/k3dma.c
@@ -275,12 +275,14 @@ static int k3_dma_start_txd(struct k3_dma_chan *c)
                list_del(&ds->vd.node);
 
                WARN_ON_ONCE(c->phy->ds_run);
-               WARN_ON_ONCE(c->phy->ds_done);
                c->phy->ds_run = ds;
+               c->phy->ds_done = NULL;
                /* start dma */
                k3_dma_set_desc(c->phy, &ds->desc_hw[0]);
                return 0;
        }
+       c->phy->ds_run = NULL;
+       c->phy->ds_done = NULL;
        return -EAGAIN;
 }