[PATCH] davinci_cpdma: Fix channel number written to teardown registers
From: Christian Riesch <hidden>
Date: 2012-02-23 07:58:00
Also in:
linux-arm-kernel
Subsystem:
networking drivers, the rest, ti ethernet switch driver (cpsw) · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
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