4.2-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Robert Jarzmik <[email protected]>

commit aebf5a67db8dbacbc624b9c652b81f5460b15eff upstream.

Since the commit to have an allocated list of virtual descriptors was
reverted, the pxa_dma driver is broken, as it assumes the descriptor is
placed on the allocated list upon allocation.

Fix the issue in pxa_dma by making an allocated virtual descriptor a
singleton.

Fixes: 8c8fe97b2b8a ("Revert "dmaengine: virt-dma: don't always free descriptor 
upon completion"")
Signed-off-by: Robert Jarzmik <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

---
 drivers/dma/pxa_dma.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/dma/pxa_dma.c
+++ b/drivers/dma/pxa_dma.c
@@ -888,6 +888,7 @@ pxad_tx_prep(struct virt_dma_chan *vc, s
        struct dma_async_tx_descriptor *tx;
        struct pxad_chan *chan = container_of(vc, struct pxad_chan, vc);
 
+       INIT_LIST_HEAD(&vd->node);
        tx = vchan_tx_prep(vc, vd, tx_flags);
        tx->tx_submit = pxad_tx_submit;
        dev_dbg(&chan->vc.chan.dev->device,


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