Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1233824

[PATCH 1/1] dmaengine: dw: fix nollp issue

Show all headers | View raw

when channel number is less than maximum number, the register
address of all channels is wrong, which causes the "nollp" flag
is set for all channels even if HW supports llp.

Signed-off-by: Yitian Bu <yitian.bu@tangramtek.com>
---
 drivers/dma/dw/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/dw/core.c b/drivers/dma/dw/core.c
index cf1c87f..c2e9ac8 100644
--- a/drivers/dma/dw/core.c
+++ b/drivers/dma/dw/core.c
@@ -1591,7 +1591,7 @@ int dw_dma_probe(struct dw_dma_chip *chip, struct
dw_dma_platform_data *pdata)
 	INIT_LIST_HEAD(&dw->dma.channels);
 	for (i = 0; i < nr_channels; i++) {
 		struct dw_dma_chan	*dwc = &dw->chan[i];
-		int			r = nr_channels - i - 1;
+		int			r = DW_DMA_MAX_NR_CHANNELS - i - 1;
 
 		dwc->chan.device = &dw->dma;
 		dma_cookie_init(&dwc->chan);
-- 
1.7.12.4



--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

[PATCH 1/1] dmaengine: dw: fix nollp issue "yitian" <yitian.bu@tangramtek.com> - 2015-09-28 05:00 +0200
  Re: [PATCH 1/1] dmaengine: dw: fix nollp issue Viresh Kumar <viresh.kumar@linaro.org> - 2015-09-28 05:20 +0200
  Re: [PATCH 1/1] dmaengine: dw: fix nollp issue Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-09-28 09:10 +0200

csiph-web