dmaengine: cppi41: Fix list not empty warning on module removal

If musb controller is configured with USB peripherals and we have
enumerated with a USB host, we can get warnings on removal of the
modules:

WARNING: CPU: 0 PID: 1269 at drivers/dma/cppi41.c:391
cppi41_dma_free_chan_resources

Fix the issue by adding the missing pm_runtime_get to
cppi41_dma_free_chan_resources to make sure the pending work
list is cleared on removal.

Fixes: fdea2d09b997 ("dmaengine: cppi41: Add basic PM runtime support")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/dma/cppi41.c b/drivers/dma/cppi41.c
index bac5f023013b..6ed99d926358 100644
--- a/drivers/dma/cppi41.c
+++ b/drivers/dma/cppi41.c
@@ -1072,7 +1072,12 @@ err_get_sync:
 static int cppi41_dma_remove(struct platform_device *pdev)
 {
         struct cppi41_dd *cdd = platform_get_drvdata(pdev);
+        int error;
 
+        error = pm_runtime_get_sync(&pdev->dev);
+        if (error < 0)
+                dev_err(&pdev->dev, "%s could not pm_runtime_get: %i\n",
+                        __func__, error);
         of_dma_controller_free(pdev->dev.of_node);
         dma_async_device_unregister(&cdd->ddev);