This is a note to let you know that I've just added the patch titled

dmaengine: stm32-dma: Set correct args number for DMA request from DT

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: dmaengine-stm32-dma-set-correct-args-number-for-dma-request-from-dt.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Wed Dec 6 17:39:55 CET 2017

From: M'boumba Cedric Madianga cedric.madianga@gmail.com Date: Tue, 13 Dec 2016 14:40:43 +0100 Subject: dmaengine: stm32-dma: Set correct args number for DMA request from DT

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);

Patches currently in stable-queue which might be from cedric.madianga@gmail.com are

queue-4.9/dmaengine-stm32-dma-fix-null-pointer-dereference-in-stm32_dma_tx_status.patch queue-4.9/dmaengine-stm32-dma-set-correct-args-number-for-dma-request-from-dt.patch