The slave device could be enumerated by ACPI. In that case the
dma_request_slave_channel should use the acpi_dma_request_slave_channel()
helper.
Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerb...@linux.intel.com>
Acked-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
---
drivers/dma/dmaengine.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 2cbfefe..8bbd6aa 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -62,6 +62,8 @@
#include <linux/rculist.h>
#include <linux/idr.h>
#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/acpi_dma.h>
#include <linux/of_dma.h>
static DEFINE_MUTEX(dma_list_mutex);
@@ -561,6 +563,10 @@ struct dma_chan *dma_request_slave_channel(struct device
*dev, const char *name)
if (dev->of_node)
return of_dma_request_slave_channel(dev->of_node, name);
+ /* If device was enumerated by ACPI get slave info from here */
+ if (ACPI_HANDLE(dev))
+ return acpi_dma_request_slave_chan_by_name(dev, name);
+
return NULL;
}
EXPORT_SYMBOL_GPL(dma_request_slave_channel);
--
1.8.2.rc0.22.gb3600c3
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