Patch "dmaengine: at_hdmac: add missing put_device() call in at_dma_xlate()" has been added to the 5.8-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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;