Commit c641c714 authored Jun 22, 2018 by Dan Carpenter Committed by Greg Kroah-Hartman Aug 28, 2018

dmaengine: k3dma: Off by one in k3_of_dma_simple_xlate()



[ Upstream commit c4c2b7644cc9a41f17a8cc8904efe3f66ae4c7ed ]

The d->chans[] array has d->dma_requests elements so the > should be
>= here.

Fixes: 8e6152bc ("dmaengine: Add hisilicon k3 DMA engine driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent a750989e

drivers/dma/k3dma.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -652,7 +652,7 @@ static struct dma_chan k3_of_dma_simple_xlate(struct of_phandle_args dma_spec,
		struct k3_dma_dev *d = ofdma->of_dma_data;
		unsigned int request = dma_spec->args[0];

		if (request > d->dma_requests)
		if (request >= d->dma_requests)
		return NULL;

		return dma_get_slave_channel(&(d->chans[request].vc.chan));