diff mbox series

[2/4] dmaengine: stm32-dma: clean channel configuration when channel is freed

Message ID 20201120143320.30367-3-amelie.delaunay@st.com (mailing list archive)
State New, archived
Headers show
Series Bunch of improvements for STM32 DMA controllers | expand

Commit Message

Amelie Delaunay Nov. 20, 2020, 2:33 p.m. UTC 
When dma_channel_release is called, it means that the channel won't be used
anymore with the configuration it had. To ensure a future client can safely
use the channel after it has been released, clean the configuration done
when channel was requested.

Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
---
 drivers/dma/stm32-dma.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c
index 55a6bd381219..62501e5d9e9d 100644
--- a/drivers/dma/stm32-dma.c
+++ b/drivers/dma/stm32-dma.c
@@ -1220,6 +1220,8 @@  static void stm32_dma_free_chan_resources(struct dma_chan *c)
 	pm_runtime_put(dmadev->ddev.dev);
 
 	vchan_free_chan_resources(to_virt_chan(c));
+	stm32_dma_clear_reg(&chan->chan_reg);
+	chan->threshold = 0;
 }
 
 static void stm32_dma_desc_free(struct virt_dma_desc *vdesc)