mmc: bcm2835: Release DMA channel on driver unload

We need to release the slave DMA channel during driver unload.

Signed-off-by: Stefan Wahren <[email protected]>
Acked-by: Eric Anholt <[email protected]>
Signed-off-by: Ulf Hansson <[email protected]>

Author: lategoodbye

drivers/mmc/host/bcm2835.c

@@ -1446,6 +1446,9 @@ static int bcm2835_remove(struct platform_device *pdev)
 	cancel_work_sync(&host->dma_work);
 	cancel_delayed_work_sync(&host->timeout_work);
 
+	if (host->dma_chan_rxtx)
+		dma_release_channel(host->dma_chan_rxtx);
+
 	mmc_free_host(host->mmc);
 	platform_set_drvdata(pdev, NULL);