[PATCH v3 1/4] of: address: Fix default coherency for MIPS

[Jiaxun Yang]

DT-based MIPS doesn't use OF_DMA_DEFAULT_COHERENT, but
might override the system-wide default at runtime.

Use dma_default_coherent to override default coherence for
MIPS.

Signed-off-by: Jiaxun Yang <jiaxun.yang at flygoat.com>
---
 drivers/of/address.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 4c0b169ef9bf..c105d66a1fa4 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -1105,6 +1105,14 @@ bool of_dma_is_coherent(struct device_node *np)
 	struct device_node *node;
 	bool is_coherent = IS_ENABLED(CONFIG_OF_DMA_DEFAULT_COHERENT);
 
+	/*
+	 * DT-based MIPS doesn't use OF_DMA_DEFAULT_COHERENT, but
+	 * might override the system-wide default at runtime.
+	 */
+#if defined(CONFIG_MIPS) && defined(CONFIG_DMA_NONCOHERENT)
+	is_coherent = dma_default_coherent;
+#endif
+
 	node = of_node_get(np);
 
 	while (node) {
-- 
2.37.1 (Apple Git-137.1)