[PATCH] dmaengine: xilinx_dma: Fix freeup active list based on descriptor completion bit

[Marek Vasut]

The xilinx_dma is completely broken since the referenced commit,
because if the (seg->hw.status & XILINX_DMA_BD_COMP_MASK) is not
set for whatever reason, the current descriptor is never moved to
the done list, and the DMA stops moving data.

Isolate the newly added check to DMA which does implement irq_delay,
that way the new check is matching what is likely some new bit in a
new core, without breaking the DMA for older versions of the same
core.

Fixes: 7bcdaa658102 ("dmaengine: xilinx_dma: Freeup active list based on descriptor completion bit")
Signed-off-by: Marek Vasut <marex at denx.de>
---
Cc: "Uwe Kleine-König" <u.kleine-koenig at baylibre.com>
Cc: Michal Simek <michal.simek at amd.com>
Cc: Peter Korsgaard <peter at korsgaard.com>
Cc: Radhey Shyam Pandey <radhey.shyam.pandey at amd.com>
Cc: Vinod Koul <vkoul at kernel.org>
Cc: dmaengine at vger.kernel.org
Cc: linux-arm-kernel at lists.infradead.org
---
 drivers/dma/xilinx/xilinx_dma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 1bdd57de87a6e..48647c8a64a5b 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -1718,7 +1718,8 @@ static void xilinx_dma_complete_descriptor(struct xilinx_dma_chan *chan)
 		return;
 
 	list_for_each_entry_safe(desc, next, &chan->active_list, node) {
-		if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
+		if (chan->xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA &&
+		    chan->irq_delay) {
 			struct xilinx_axidma_tx_segment *seg;
 
 			seg = list_last_entry(&desc->segments,
-- 
2.45.2