[PATCH] davinci_cpdma: Fix channel number written to teardown registers

[PATCH] davinci_cpdma: Fix channel number written to teardown registers

[Christian Riesch]

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-3mrvs1K0uXizZXS1Dc/lvw@public.gmane.org>
---
 drivers/net/ethernet/ti/davinci_cpdma.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/ti/davinci_cpdma.c b/drivers/net/ethernet/ti/davinci_cpdma.c
index c97d2f5..3455876 100644
--- a/drivers/net/ethernet/ti/davinci_cpdma.c
+++ b/drivers/net/ethernet/ti/davinci_cpdma.c
@@ -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 */
-- 
1.7.0.4

Re: [PATCH] davinci_cpdma: Fix channel number written to teardown registers

[David Miller]

From: Christian Riesch <christian.riesch-3mrvs1K0uXizZXS1Dc/lvw@public.gmane.org>
Date: Thu, 23 Feb 2012 08:58:00 +0100

> 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-3mrvs1K0uXizZXS1Dc/lvw@public.gmane.org>

Applied to net-next.