dmaengine: at_hdmac: check return value of of_find_device_by_node() in at_dma_xlate()
[ Upstream commit5.4-rM2-2.2.x-imx-squashed0cef8e2c5a
] The reurn value of of_find_device_by_node() is not checked, thus null pointer dereference will be triggered if of_find_device_by_node() failed. Fixes:bbe89c8e3d
("at_hdmac: move to generic DMA binding") Signed-off-by: Yu Kuai <yukuai3@huawei.com> Link: https://lore.kernel.org/r/20200817115728.1706719-2-yukuai3@huawei.com Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
parent
2f2786bb9d
commit
242a7ab0ac
|
@ -1667,6 +1667,8 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec,
|
||||||
return NULL;
|
return NULL;
|
||||||
|
|
||||||
dmac_pdev = of_find_device_by_node(dma_spec->np);
|
dmac_pdev = of_find_device_by_node(dma_spec->np);
|
||||||
|
if (!dmac_pdev)
|
||||||
|
return NULL;
|
||||||
|
|
||||||
dma_cap_zero(mask);
|
dma_cap_zero(mask);
|
||||||
dma_cap_set(DMA_SLAVE, mask);
|
dma_cap_set(DMA_SLAVE, mask);
|
||||||
|
|
Loading…
Reference in New Issue