Thread (3 messages) flat view 3 messages, 2 authors, 2019-12-25

Re: [PATCH 1/2] dmaengine: move module_/dma_device_put() after route free

From: Logan Gunthorpe <logang@deltatee.com>
Date: 2019-12-25 02:26:34


On 2019-12-23 10:03 p.m., Vinod Koul wrote:
We call dma_device_put() and module_put() after invoking
.device_free_chan_resources callback, but we should also take care of
router devices and invoke this after .route_free callback. So move it
after .route_free

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Makes sense.

Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
quoted hunk ↗ jump to hunk
---
 drivers/dma/dmaengine.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index e316abe3672d..0505ea5b002f 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -427,15 +427,15 @@ static void dma_chan_put(struct dma_chan *chan)
 		chan->device->device_free_chan_resources(chan);
 	}
 
-	dma_device_put(chan->device);
-	module_put(dma_chan_to_owner(chan));
-
 	/* If the channel is used via a DMA request router, free the mapping */
 	if (chan->router && chan->router->route_free) {
 		chan->router->route_free(chan->router->dev, chan->route_data);
 		chan->router = NULL;
 		chan->route_data = NULL;
 	}
+
+	dma_device_put(chan->device);
+	module_put(dma_chan_to_owner(chan));
 }
 
 enum dma_status dma_sync_wait(struct dma_chan *chan, dma_cookie_t cookie)
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