In the future ->acpi_dma_xlate() callback function may use the consumer
device pointer to be utilized for DMA crossbar programming.
As a preparation step provide consumer device pointer to ->acpi_dma_xlate().
Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
drivers/dma/acpi-dma.c | 1 +
include/linux/acpi_dma.h | 2 ++
2 files changed, 3 insertions(+)
diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c
index b17373ee7ce0..1f35239e3ca2 100644
--- a/drivers/dma/acpi-dma.c
+++ b/drivers/dma/acpi-dma.c
@@ -373,6 +373,7 @@ struct dma_chan *acpi_dma_request_slave_chan_by_index(struct device *dev,
memset(&pdata, 0, sizeof(pdata));
/* Initial values for the request line and channel */
+ dma_spec->consumer = dev;
dma_spec->index = index;
dma_spec->chan_id = -1;
dma_spec->slave_id = -1;
diff --git a/include/linux/acpi_dma.h b/include/linux/acpi_dma.h
index 2caebb8fb158..3b97d0b702af 100644
--- a/include/linux/acpi_dma.h
+++ b/include/linux/acpi_dma.h
@@ -18,6 +18,7 @@
/**
* struct acpi_dma_spec - slave device DMA resources
+ * @consumer: struct device of the DMA resources consumer
* @index: index of FixedDMA() resource
* @chan_id: channel unique id
* @slave_id: request line unique id
@@ -25,6 +26,7 @@
* function
*/
struct acpi_dma_spec {
+ struct device *consumer;
size_t index;
int chan_id;
int slave_id;
--
2.20.1
