mcb: Add a dma_device to mcb_device
When performing DMA operations on a MCB device, the device needed
for using the DMA API is "mcb_device->bus_carrier".
This is rather lengthy, so a shortcut is introduced to struct mcb_device
in order to ensure the MCB device driver uses the correct device for DMA
operations.
Signed-off-by: Michael Moese <michael.moese@men.de>
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/mcb/mcb-core.c b/drivers/mcb/mcb-core.c
index 5306966..921a5d2 100644
--- a/drivers/mcb/mcb-core.c
+++ b/drivers/mcb/mcb-core.c
@@ -233,6 +233,7 @@
dev->dev.bus = &mcb_bus_type;
dev->dev.parent = bus->dev.parent;
dev->dev.release = mcb_release_dev;
+ dev->dma_dev = bus->carrier;
device_id = dev->id;
dev_set_name(&dev->dev, "mcb%d-16z%03d-%d:%d:%d",
diff --git a/include/linux/mcb.h b/include/linux/mcb.h
index ee5200d..4097ac9 100644
--- a/include/linux/mcb.h
+++ b/include/linux/mcb.h
@@ -76,6 +76,7 @@
int rev;
struct resource irq;
struct resource mem;
+ struct device *dma_dev;
};
static inline struct mcb_device *to_mcb_device(struct device *dev)
