From: Felix Fietkau <nbd@nbd.name>
Date: Tue, 5 Dec 2017 12:34:31 +0100
Subject: [PATCH] MIPS: mm: remove mips_dma_mapping_error

dma_mapping_error() already checks if ops->mapping_error is a null
pointer

Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

--- a/arch/mips/mm/dma-default.c
+++ b/arch/mips/mm/dma-default.c
@@ -373,11 +373,6 @@ static void mips_dma_sync_sg_for_device(
 	}
 }
 
-static int mips_dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
-	return 0;
-}
-
 static int mips_dma_supported(struct device *dev, u64 mask)
 {
 	return plat_dma_supported(dev, mask);
@@ -406,7 +401,6 @@ static const struct dma_map_ops mips_def
 	.sync_single_for_device = mips_dma_sync_single_for_device,
 	.sync_sg_for_cpu = mips_dma_sync_sg_for_cpu,
 	.sync_sg_for_device = mips_dma_sync_sg_for_device,
-	.mapping_error = mips_dma_mapping_error,
 	.dma_supported = mips_dma_supported
 };
 
