patch "usb: cdns3: imx: fix can't create core device the second time issue" added to usb-linus

This is a note to let you know that I've just added the patch titled

usb: cdns3: imx: fix can't create core device the second time issue

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 2ef02b846ee2526249a562a66d6dcb25fcbca9d8 Mon Sep 17 00:00:00 2001
From: Peter Chen <[email protected]>
Date: Thu, 10 Dec 2020 21:31:37 +0800
Subject: usb: cdns3: imx: fix can't create core device the second time issue

The cdns3 core device is populated by calling of_platform_populate, the flag OF_POPULATED is set for core device node, if this flag is not cleared, when calling of_platform_populate the second time after loading parent module again, the OF code will not try to create platform device for core device.

To fix it, it uses of_platform_depopulate to depopulate the core device which the parent created, and the flag OF_POPULATED for core device node will be cleared accordingly.

---
 drivers/usb/cdns3/cdns3-imx.c | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

index 4d3fedc86753..6b358e8be579 100644
@@ -218,20 +218,11 @@ static int cdns_imx_probe(struct platform_device *pdev)
 	return ret;
 }
 
-static int cdns_imx_remove_core(struct device *dev, void *data)
-{
-	struct platform_device *pdev = to_platform_device(dev);
-
-	platform_device_unregister(pdev);
-
-	return 0;
-}
-
 static int cdns_imx_remove(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 
-	device_for_each_child(dev, NULL, cdns_imx_remove_core);
+	of_platform_depopulate(dev);
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;

2.30.0