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Blackfin arch: dma code: cannot simply OR the ndsize 

cannot simply OR the ndsize ... need to clear out the old value first

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger 2009-01-07 23:14:38 +08:00 committed by Bryan Wu
parent b649839192
commit d41e800999
1 changed files with 3 additions and 1 deletions
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4
arch/blackfin/include/asm/dma.h
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@ -205,7 +205,9 @@ 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)
{
dma_ch[channel].regs->cfg |= ((ndsize & 0x0F) << 8);
dma_ch[channel].regs->cfg =
(dma_ch[channel].regs->cfg & ~(0xf << 8)) |
((ndsize & 0xf) << 8);
dma_ch[channel].regs->next_desc_ptr = sg;
}