diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index acceae0..f9c4ba5 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -10,7 +10,6 @@
 
 config ZONE_DMA
 	bool
-	default y
 
 choice
 	prompt "System type"
@@ -923,6 +922,7 @@
 
 config GENERIC_ISA_DMA
 	bool
+	select ZONE_DMA
 
 config I8259
 	bool
@@ -946,6 +946,7 @@
 
 config GENERIC_ISA_DMA_SUPPORT_BROKEN
 	bool
+	select ZONE_DMA
 
 #
 # Endianess selection.  Sufficiently obscure so many users don't know what to
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index e9951c0e..8800c88 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -351,18 +351,15 @@
 #endif
 	kmap_coherent_init();
 
-#ifdef CONFIG_ISA
-	if (max_low_pfn >= MAX_DMA_PFN)
-		if (min_low_pfn >= MAX_DMA_PFN) {
-			zones_size[ZONE_DMA] = 0;
-			zones_size[ZONE_NORMAL] = max_low_pfn - min_low_pfn;
-		} else {
-			zones_size[ZONE_DMA] = MAX_DMA_PFN - min_low_pfn;
-			zones_size[ZONE_NORMAL] = max_low_pfn - MAX_DMA_PFN;
-		}
+#ifdef CONFIG_ZONE_DMA
+	if (min_low_pfn < MAX_DMA_PFN && MAX_DMA_PFN <= max_low_pfn) {
+		zones_size[ZONE_DMA] = MAX_DMA_PFN - min_low_pfn;
+		zones_size[ZONE_NORMAL] = max_low_pfn - MAX_DMA_PFN;
+	} else if (max_low_pfn < MAX_DMA_PFN)
+		zones_size[ZONE_DMA] = max_low_pfn - min_low_pfn;
 	else
 #endif
-	zones_size[ZONE_DMA] = max_low_pfn - min_low_pfn;
+	zones_size[ZONE_NORMAL] = max_low_pfn - min_low_pfn;
 
 #ifdef CONFIG_HIGHMEM
 	zones_size[ZONE_HIGHMEM] = highend_pfn - highstart_pfn;