diff -Naur kernel.orig/arch/arm/mm/dma-mapping.c kernel/arch/arm/mm/dma-mapping.c
--- kernel.orig/arch/arm/mm/dma-mapping.c	2014-12-01 22:28:01.000000000 +0000
+++ kernel/arch/arm/mm/dma-mapping.c	2014-12-13 23:32:39.414860534 +0000
@@ -303,7 +303,7 @@
 	vunmap(cpu_addr);
 }
 
-#define DEFAULT_DMA_COHERENT_POOL_SIZE	SZ_256K
+#define DEFAULT_DMA_COHERENT_POOL_SIZE	SZ_1M
 
 struct dma_pool {
 	size_t size;