[PATCH v4 6/9] dmaengine: dw-edma: Clear stale requests on termination

[Koichiro Den]

terminate_all() can finish immediately when the channel is unconfigured,
paused, idle, or already stopped in hardware. A pending PAUSE request can
survive these paths and block issue_pending() even after termination.

Clear the request whenever termination leaves the channel idle. A running
channel keeps its STOP request until the interrupt handler consumes it.

Fixes: e63d79d1ffcd ("dmaengine: Add Synopsys eDMA IP core driver")
Reviewed-by: Frank Li <Frank.Li@xxxxxxx>
Signed-off-by: Koichiro Den <den@xxxxxxxxxxxxx>
---
Changes in v4:
  - Collect Frank's Reviewed-by tag and adjust context for the preceding
    patch.

 drivers/dma/dw-edma/dw-edma-core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index 64ace6b9ebdc..b76f0aeb647d 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -364,6 +364,8 @@ static int dw_edma_device_terminate_all(struct dma_chan *dchan)
 	} else {
 		chan->request = EDMA_REQ_STOP;
 	}
+	if (chan->status == EDMA_ST_IDLE)
+		chan->request = EDMA_REQ_NONE;
 
 	return err;
 }
-- 
2.51.0