drivers: remove force dma flag from buses

With each bus implementing its own DMA configuration callback, there is no
need for bus to explicitly set the force_dma flag.  Modify the
of_dma_configure function to accept an input parameter which specifies if
implicit DMA configuration is required when it is not described by the
firmware.

Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>  # PCI parts
Reviewed-by: Rob Herring <robh@kernel.org>
[hch: tweaked the changelog a bit]
Signed-off-by: Christoph Hellwig <hch@lst.de>

2 files changed, 6 insertions, 6 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index 63aa672bd394..563077d1cdc1 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -98,8 +98,6 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
  * @p:          The private data of the driver core, only the driver core can
  *              touch this.
  * @lock_key:   Lock class key for use by the lock validator
- * @force_dma:  Assume devices on this bus should be set up by dma_configure()
- *              even if DMA capability is not explicitly described by firmware.
  *
  * A bus is a channel between the processor and one or more devices. For the
  * purposes of the device model, all devices are connected via a bus, even if
@@ -140,8 +138,6 @@ struct bus_type {
 
         struct subsys_private *p;
         struct lock_class_key lock_key;
-
-        bool force_dma;
 };
 
 extern int __must_check bus_register(struct bus_type *bus);
diff --git a/include/linux/of_device.h b/include/linux/of_device.h
index 8da5a1b31ece..165fd302b442 100644
--- a/include/linux/of_device.h
+++ b/include/linux/of_device.h
@@ -55,7 +55,9 @@ static inline struct device_node *of_cpu_device_node_get(int cpu)
         return of_node_get(cpu_dev->of_node);
 }
 
-int of_dma_configure(struct device *dev, struct device_node *np);
+int of_dma_configure(struct device *dev,
+                     struct device_node *np,
+                     bool force_dma);
 void of_dma_deconfigure(struct device *dev);
 #else /* CONFIG_OF */
 
@@ -105,7 +107,9 @@ static inline struct device_node *of_cpu_device_node_get(int cpu)
         return NULL;
 }
 
-static inline int of_dma_configure(struct device *dev, struct device_node *np)
+static inline int of_dma_configure(struct device *dev,
+                                   struct device_node *np,
+                                   bool force_dma)
 {
         return 0;
 }