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Subject[PATCH 4.9 037/109] dmaengine: stm32-dma: Set correct args number for DMA request from DT
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: M'boumba Cedric Madianga <cedric.madianga@gmail.com>


[ Upstream commit 7e96304d99477de1f70db42035071e56439da817 ]

This patch sets the right number of arguments to be used for DMA clients
which request channels from DT.

Signed-off-by: M'boumba Cedric Madianga <cedric.madianga@gmail.com>
Reviewed-by: Ludovic BARRE <ludovic.barre@st.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/dma/stm32-dma.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

--- a/drivers/dma/stm32-dma.c
+++ b/drivers/dma/stm32-dma.c
@@ -976,21 +976,18 @@ static struct dma_chan *stm32_dma_of_xla
struct stm32_dma_chan *chan;
struct dma_chan *c;

- if (dma_spec->args_count < 3)
+ if (dma_spec->args_count < 4)
return NULL;

cfg.channel_id = dma_spec->args[0];
cfg.request_line = dma_spec->args[1];
cfg.stream_config = dma_spec->args[2];
- cfg.threshold = 0;
+ cfg.threshold = dma_spec->args[3];

if ((cfg.channel_id >= STM32_DMA_MAX_CHANNELS) || (cfg.request_line >=
STM32_DMA_MAX_REQUEST_ID))
return NULL;

- if (dma_spec->args_count > 3)
- cfg.threshold = dma_spec->args[3];
-
chan = &dmadev->chan[cfg.channel_id];

c = dma_get_slave_channel(&chan->vchan.chan);

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