This is a note to let you know that I've just added the patch titled dmaengine: at_hdmac: add missing put_device() call in at_dma_xlate() to the 5.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: dmaengine-at_hdmac-add-missing-put_device-call-in-at.patch and it can be found in the queue-5.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 55fc955506b88da0399691c5ae3752024093e6e4 Author: Yu Kuai <yukuai3@xxxxxxxxxx> Date: Mon Aug 17 19:57:27 2020 +0800 dmaengine: at_hdmac: add missing put_device() call in at_dma_xlate() [ Upstream commit 3832b78b3ec2cf51e07102f9b4480e343459b20f ] If of_find_device_by_node() succeed, at_dma_xlate() doesn't have a corresponding put_device(). Thus add put_device() to fix the exception handling for this function implementation. Fixes: bbe89c8e3d59 ("at_hdmac: move to generic DMA binding") Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx> Link: https://lore.kernel.org/r/20200817115728.1706719-3-yukuai3@xxxxxxxxxx Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c index 22c1c507055a3..c91642b5f1037 100644 --- a/drivers/dma/at_hdmac.c +++ b/drivers/dma/at_hdmac.c @@ -1657,8 +1657,10 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec, dma_cap_set(DMA_SLAVE, mask); atslave = kmalloc(sizeof(*atslave), GFP_KERNEL); - if (!atslave) + if (!atslave) { + put_device(&dmac_pdev->dev); return NULL; + } atslave->cfg = ATC_DST_H2SEL_HW | ATC_SRC_H2SEL_HW; /* @@ -1687,8 +1689,10 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec, atslave->dma_dev = &dmac_pdev->dev; chan = dma_request_channel(mask, at_dma_filter, atslave); - if (!chan) + if (!chan) { + put_device(&dmac_pdev->dev); return NULL; + } atchan = to_at_dma_chan(chan); atchan->per_if = dma_spec->args[0] & 0xff;