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Subject[PATCH 2/4] dma-mapping: remove dma_configure
Date
There is no good reason for this indirection given that the method
always exists.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
drivers/base/dd.c | 8 +++++---
include/linux/dma-mapping.h | 6 ------
kernel/dma/mapping.c | 10 ----------
3 files changed, 5 insertions(+), 19 deletions(-)

diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index edfc9f0b1180..65128cf8427c 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -480,9 +480,11 @@ static int really_probe(struct device *dev, struct device_driver *drv)
if (ret)
goto pinctrl_bind_failed;

- ret = dma_configure(dev);
- if (ret)
- goto dma_failed;
+ if (dev->bus->dma_configure) {
+ ret = dev->bus->dma_configure(dev);
+ if (ret)
+ goto dma_failed;
+ }

if (driver_sysfs_add(dev)) {
printk(KERN_ERR "%s: driver_sysfs_add(%s) failed\n",
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 1db6a6b46d0d..1c6c7c09bcf2 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -754,14 +754,8 @@ dma_mark_declared_memory_occupied(struct device *dev,
#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */

#ifdef CONFIG_HAS_DMA
-int dma_configure(struct device *dev);
void dma_deconfigure(struct device *dev);
#else
-static inline int dma_configure(struct device *dev)
-{
- return 0;
-}
-
static inline void dma_deconfigure(struct device *dev) {}
#endif

diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index d2a92ddaac4d..25607ceb4a50 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -328,16 +328,6 @@ void dma_common_free_remap(void *cpu_addr, size_t size, unsigned long vm_flags)
}
#endif

-/*
- * enables DMA API use for a device
- */
-int dma_configure(struct device *dev)
-{
- if (dev->bus->dma_configure)
- return dev->bus->dma_configure(dev);
- return 0;
-}
-
void dma_deconfigure(struct device *dev)
{
of_dma_deconfigure(dev);
--
2.18.0
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