diff options
Diffstat (limited to 'arch/arm/common')
| -rw-r--r-- | arch/arm/common/dmabounce.c | 18 | ||||
| -rw-r--r-- | arch/arm/common/sharpsl_param.c | 2 |
2 files changed, 17 insertions, 3 deletions
diff --git a/arch/arm/common/dmabounce.c b/arch/arm/common/dmabounce.c index 5797b1b100a..9d63a01214e 100644 --- a/arch/arm/common/dmabounce.c +++ b/arch/arm/common/dmabounce.c @@ -30,6 +30,8 @@ #include <linux/dmapool.h> #include <linux/list.h> +#include <asm/cacheflush.h> + #undef DEBUG #undef STATS @@ -302,12 +304,24 @@ unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, DO_STATS ( device_info->bounce_count++ ); - if ((dir == DMA_FROM_DEVICE) || - (dir == DMA_BIDIRECTIONAL)) { + if (dir == DMA_FROM_DEVICE || dir == DMA_BIDIRECTIONAL) { + unsigned long ptr; + dev_dbg(dev, "%s: copy back safe %p to unsafe %p size %d\n", __func__, buf->safe, buf->ptr, size); memcpy(buf->ptr, buf->safe, size); + + /* + * DMA buffers must have the same cache properties + * as if they were really used for DMA - which means + * data must be written back to RAM. Note that + * we don't use dmac_flush_range() here for the + * bidirectional case because we know the cache + * lines will be coherent with the data written. + */ + ptr = (unsigned long)buf->ptr; + dmac_clean_range(ptr, ptr + size); } free_safe_buffer(device_info, buf); } diff --git a/arch/arm/common/sharpsl_param.c b/arch/arm/common/sharpsl_param.c index c2c557a224c..c94864c5b1a 100644 --- a/arch/arm/common/sharpsl_param.c +++ b/arch/arm/common/sharpsl_param.c @@ -22,7 +22,7 @@ * them early in the boot process, then pass them to the appropriate drivers. * Not all devices use all paramaters but the format is common to all. */ -#ifdef ARCH_SA1100 +#ifdef CONFIG_ARCH_SA1100 #define PARAM_BASE 0xe8ffc000 #else #define PARAM_BASE 0xa0000a00 |