[PATCH v3 6/9] dmaengine: dw-edma: Clear stale requests on termination

[Koichiro Den]

terminate_all() can deconfigure a channel immediately when it is already
unconfigured, paused, idle, or stopped in hardware. A pending PAUSE
request can survive these paths and block issue_pending() after the
channel is configured again.

Clear request whenever termination leaves the channel deconfigured. A
running channel remains configured while its STOP request is pending, so
the interrupt handler can still consume that request.

Fixes: e63d79d1ffcd ("dmaengine: Add Synopsys eDMA IP core driver")
Signed-off-by: Koichiro Den <den@xxxxxxxxxxxxx>
---
Changes in v3:
  - New patch for a pre-existing stale request issue. (Sashiko)

 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 8b0e2af734da..2369b4c4630b 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -369,6 +369,8 @@ static int dw_edma_device_terminate_all(struct dma_chan *dchan)
 	} else {
 		chan->request = EDMA_REQ_STOP;
 	}
+	if (!chan->configured)
+		chan->request = EDMA_REQ_NONE;
 	spin_unlock_irqrestore(&chan->vc.lock, flags);
 
 	return err;
-- 
2.51.0