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 <[email protected]> Reviewed-by: Mika Westerberg <[email protected]> Acked-by: Rafael J. Wysocki <[email protected]> --- drivers/dma/dmaengine.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c index c121b03..93f7992 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); @@ -564,6 +566,10 @@ 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
