lkml.org 
[lkml]   [2016]   [Jan]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] dmaengine: dw: fix cyclic transfers
Date
Commit 61e183f83069 ("dmaengine/dw_dmac: Reconfigure interrupt and
chan_cfg register on resume") moved some channel initialisation to
a new function which must be called before starting a transfer.

This adds the necessary dwc_initialize() call to dw_dma_cyclic_start()
which was missed in the original commit.

Fixes: 61e183f83069 ("dmaengine/dw_dmac: Reconfigure interrupt and chan_cfg register on resume")
Signed-off-by: Mans Rullgard <mans@mansr.com>
---
Andy, do you want to collect this with your other patches? It's trivial
enough that it can go in separately without conflicts too.
---
drivers/dma/dw/core.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index 7067b6ddc1db..2917f75b67b4 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -1265,6 +1265,8 @@ int dw_dma_cyclic_start(struct dma_chan *chan)
return -EBUSY;
}

+ dwc_initialize(dwc);
+
dma_writel(dw, CLEAR.ERROR, dwc->mask);
dma_writel(dw, CLEAR.XFER, dwc->mask);

--
2.7.0
\
 
 \ /
  Last update: 2016-01-10 22:41    [W:0.028 / U:0.444 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site