From: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>
Certain IP blocks may strictly require/expect a nE mapping to function
correctly, while others may be fine without it (which is preferred for
performance reasons).
Allow specifying nonposted-mmio on a per-device basis.
Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>
---
drivers/of/address.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 2041ea112ded70e11d3831b403901c36c8c29a93..f0f8f0dd191cfe05dfc29246da5fe665d5fb9c6e 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -1035,10 +1035,11 @@ EXPORT_SYMBOL_GPL(of_dma_is_coherent);
static bool of_mmio_is_nonposted(const struct device_node *np)
{
struct device_node *parent __free(device_node) = of_get_parent(np);
- if (!parent)
- return false;
- return of_property_read_bool(parent, "nonposted-mmio");
+ if (of_property_read_bool(np, "nonposted-mmio"))
+ return true;
+
+ return parent && of_property_read_bool(parent, "nonposted-mmio");
}
static int __of_address_to_resource(struct device_node *dev, int index, int bar_no,
--
2.48.1
