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davinci_cpdma: Fix channel number written to teardown registers 

chan->chan_num is 0..CPDMA_MAX_CHANNELS-1 for tx channels and
CPDMA_MAX_CHANNELS..2*CPDMA_MAX_CHANNELS-1 for rx channels. However,
the rx and tx teardown registers expect zero based channel numbering.

Since the upper bits of the registers are reserved, the teardown also
worked before, this patch is cleanup only.

Signed-off-by: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christian Riesch 2012-02-22 21:58:00 +00:00 committed by David S. Miller
parent d708f6039b
commit b4ad042813
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/ti/davinci_cpdma.c
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@ -822,7 +822,7 @@ int cpdma_chan_stop(struct cpdma_chan *chan)
dma_reg_write(ctlr, chan->int_clear, chan->mask);
/* trigger teardown */
dma_reg_write(ctlr, chan->td, chan->chan_num);
dma_reg_write(ctlr, chan->td, chan_linear(chan));
/* wait for teardown complete */
timeout = jiffies + HZ/10; /* 100 msec */