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-rw-r--r--target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch27
1 files changed, 27 insertions, 0 deletions
diff --git a/target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch b/target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch
index 4652a4fc6..33509baa2 100644
--- a/target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch
+++ b/target/linux/ixp4xx/patches-2.6.36/050-disable_dmabounce.patch
@@ -119,3 +119,30 @@
#define ISA_DMA_THRESHOLD (SZ_64M - 1)
#define MAX_DMA_ADDRESS (PAGE_OFFSET + SZ_64M)
+--- a/arch/arm/common/dmabounce.c
++++ b/arch/arm/common/dmabounce.c
+@@ -30,6 +30,7 @@
+ #include <linux/dma-mapping.h>
+ #include <linux/dmapool.h>
+ #include <linux/list.h>
++#include <linux/pci.h>
+ #include <linux/scatterlist.h>
+
+ #include <asm/cacheflush.h>
+@@ -248,8 +249,15 @@ static inline dma_addr_t map_single(stru
+ needs_bounce = (dma_addr | (dma_addr + size - 1)) & ~mask;
+ }
+
+- if (device_info && (needs_bounce || dma_needs_bounce(dev, dma_addr, size))) {
++#ifdef CONFIG_DMABOUNCE
++int dma_needs_bounce_2(struct device *dev, dma_addr_t dma_addr, size_t size)
++{
++ return (dev->bus == &pci_bus_type ) && ((dma_addr + size) > SZ_64M);
++}
++
++ if (device_info && (needs_bounce || dma_needs_bounce_2(dev, dma_addr, size))) {
+ struct safe_buffer *buf;
++#endif
+
+ buf = alloc_safe_buffer(device_info, ptr, size, dir);
+ if (buf == 0) {