dmaengine: at_xdmac: Add DMA_PRIVATE

same issue as commit 7f5ae3553685:
"Without DMA_PRIVATE the driver is not able to allocate more than one channel.
Since it uses dma_get_any_slave_channel that calls private_candidate, the
second allocation fails at
/* some channels are already publicly allocated */
"

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index 586275fe1120..b60d77a22df6 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -1394,6 +1394,11 @@ static int at_xdmac_probe(struct platform_device *pdev)
         dma_cap_set(DMA_CYCLIC, atxdmac->dma.cap_mask);
         dma_cap_set(DMA_MEMCPY, atxdmac->dma.cap_mask);
         dma_cap_set(DMA_SLAVE, atxdmac->dma.cap_mask);
+        /*
+         * Without DMA_PRIVATE the driver is not able to allocate more than
+         * one channel, second allocation fails in private_candidate.
+         */
+        dma_cap_set(DMA_PRIVATE, atxdmac->dma.cap_mask);
         atxdmac->dma.dev                                = &pdev->dev;
         atxdmac->dma.device_alloc_chan_resources        = at_xdmac_alloc_chan_resources;
         atxdmac->dma.device_free_chan_resources         = at_xdmac_free_chan_resources;