of: reserved_mem: set dma_ops for devices using reserved mem

For some IPs, there may be virtual child devices created and for them its
necessary to set the dma_ops if it's using reserved memory else it will call
the dummy dma_ops during buffer operations for the child devices which will
lead to memory mapping failure.

Signed-off-by: Smitha T Murthy <smitha.t@samsung.com>
Signed-off-by: Pankaj Dubey <pankaj.dubey@samsung.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c
index 366d8c3c79893b04261644f8064266b8e41be82e..d507c3569a88acac9e796f1f172f412e5386347f 100644 (file)
--- a/drivers/of/of_reserved_mem.c
+++ b/drivers/of/of_reserved_mem.c
@@ -354,6 +354,10 @@ int of_reserved_mem_device_init_by_idx(struct device *dev,
                mutex_lock(&of_rmem_assigned_device_mutex);
                list_add(&rd->list, &of_rmem_assigned_device_list);
                mutex_unlock(&of_rmem_assigned_device_mutex);
+               /* ensure that dma_ops is set for virtual devices
+                * using reserved memory
+                */
+               of_dma_configure(dev, np);
 
                dev_info(dev, "assigned reserved memory node %s\n", rmem->name);
        } else {