diff options
| -rw-r--r-- | arch/blackfin/include/asm/dma.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/blackfin/include/asm/dma.h b/arch/blackfin/include/asm/dma.h index 46c56185417a..c9a59622e23f 100644 --- a/arch/blackfin/include/asm/dma.h +++ b/arch/blackfin/include/asm/dma.h @@ -206,10 +206,16 @@ static inline unsigned long get_dma_curr_addr(unsigned int channel) static inline void set_dma_sg(unsigned int channel, struct dmasg *sg, int ndsize) { + /* Make sure the internal data buffers in the core are drained + * so that the DMA descriptors are completely written when the + * DMA engine goes to fetch them below. + */ + SSYNC(); + + dma_ch[channel].regs->next_desc_ptr = sg; dma_ch[channel].regs->cfg = (dma_ch[channel].regs->cfg & ~(0xf << 8)) | ((ndsize & 0xf) << 8); - dma_ch[channel].regs->next_desc_ptr = sg; } static inline int dma_channel_active(unsigned int channel) |