dmaengine: at_xdmac: fix memory leak in interleaved mode

In interleaved mode, when numf > 1, we have only one descriptor for the
transfer but this descriptor has to be added to the descs_list. If not,
when doing remove_xfer, the descriptor won't be put back in the
free_descs_list.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/dma/at_xdmac.c b/drivers/dma/at_xdmac.c
index 0190d1ca3004..2ab6fe7339e6 100644
--- a/drivers/dma/at_xdmac.c
+++ b/drivers/dma/at_xdmac.c
@@ -958,6 +958,10 @@ at_xdmac_prep_interleaved(struct dma_chan *chan,
                                                         xt, xt->sgl);
                 for (i = 0; i < xt->numf; i++)
                         at_xdmac_increment_block_count(chan, first);
+
+                dev_dbg(chan2dev(chan), "%s: add desc 0x%p to descs_list 0x%p\n",
+                        __func__, first, first);
+                list_add_tail(&first->desc_node, &first->descs_list);
         } else {
                 for (i = 0; i < xt->frame_size; i++) {
                         size_t src_icg = 0, dst_icg = 0;