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mcb: Add a dma_device to mcb_device

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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>
This commit is contained in:
Michael Moese 2016-09-14 12:05:24 +02:00 committed by Greg Kroah-Hartman
parent 15bb81d334
commit 2d8784df1a
2 changed files with 2 additions and 0 deletions
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1
drivers/mcb/mcb-core.c
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@ -233,6 +233,7 @@ int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev)
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",

1
include/linux/mcb.h
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@ -76,6 +76,7 @@ struct mcb_device {
int rev;
struct resource irq;
struct resource mem;
struct device *dma_dev;
};
static inline struct mcb_device *to_mcb_device(struct device *dev)