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Diffstat (limited to 'arch/blackfin/kernel/bfin_dma_5xx.c')
-rw-r--r--arch/blackfin/kernel/bfin_dma_5xx.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c
index 9f9b8281665..384868dedac 100644
--- a/arch/blackfin/kernel/bfin_dma_5xx.c
+++ b/arch/blackfin/kernel/bfin_dma_5xx.c
@@ -19,6 +19,7 @@
#include <asm/cacheflush.h>
#include <asm/dma.h>
#include <asm/uaccess.h>
+#include <asm/early_printk.h>
/*
* To make sure we work around 05000119 - we always check DMA_DONE bit,
@@ -146,8 +147,8 @@ EXPORT_SYMBOL(request_dma);
int set_dma_callback(unsigned int channel, irq_handler_t callback, void *data)
{
- BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
- && channel < MAX_DMA_CHANNELS));
+ BUG_ON(channel >= MAX_DMA_CHANNELS ||
+ dma_ch[channel].chan_status == DMA_CHANNEL_FREE);
if (callback != NULL) {
int ret;
@@ -181,8 +182,8 @@ static void clear_dma_buffer(unsigned int channel)
void free_dma(unsigned int channel)
{
pr_debug("freedma() : BEGIN \n");
- BUG_ON(!(dma_ch[channel].chan_status != DMA_CHANNEL_FREE
- && channel < MAX_DMA_CHANNELS));
+ BUG_ON(channel >= MAX_DMA_CHANNELS ||
+ dma_ch[channel].chan_status == DMA_CHANNEL_FREE);
/* Halt the DMA */
disable_dma(channel);
@@ -236,6 +237,7 @@ void blackfin_dma_resume(void)
*/
void __init blackfin_dma_early_init(void)
{
+ early_shadow_stamp();
bfin_write_MDMA_S0_CONFIG(0);
bfin_write_MDMA_S1_CONFIG(0);
}
@@ -246,6 +248,8 @@ void __init early_dma_memcpy(void *pdst, const void *psrc, size_t size)
unsigned long src = (unsigned long)psrc;
struct dma_register *dst_ch, *src_ch;
+ early_shadow_stamp();
+
/* We assume that everything is 4 byte aligned, so include
* a basic sanity check
*/
@@ -300,6 +304,8 @@ void __init early_dma_memcpy(void *pdst, const void *psrc, size_t size)
void __init early_dma_memcpy_done(void)
{
+ early_shadow_stamp();
+
while ((bfin_read_MDMA_S0_CONFIG() && !(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)) ||
(bfin_read_MDMA_S1_CONFIG() && !(bfin_read_MDMA_D1_IRQ_STATUS() & DMA_DONE)))
continue;