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[v2,5/5] PCI/pwrctl: Remove pwrctl device without iterating over all children of pwrctl parent

Message ID 20241025-pci-pwrctl-rework-v2-5-568756156cbe@linaro.org (mailing list archive)
State New
Headers show
Series PCI/pwrctl: Ensure that the pwrctl drivers are probed before PCI client drivers | expand

Commit Message

Manivannan Sadhasivam via B4 Relay Oct. 25, 2024, 7:54 a.m. UTC 
From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

There is no need to iterate over all children of the pwrctl device parent
to remove the pwrctl device. Since the pwrctl device associated with the
PCI device can be found using of_find_device_by_node() API, use it directly
instead.

If any pwrctl devices lying around without getting associated with the PCI
devices, then those will be removed once their parent device gets removed.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Tested-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
Tested-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 drivers/pci/remove.c | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index e4ce1145aa3e..3dd9b3024956 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -17,16 +17,16 @@  static void pci_free_resources(struct pci_dev *dev)
 	}
 }
 
-static int pci_pwrctl_unregister(struct device *dev, void *data)
+static void pci_pwrctl_unregister(struct device *dev)
 {
-	struct device_node *pci_node = data, *plat_node = dev_of_node(dev);
+	struct platform_device *pdev;
 
-	if (dev_is_platform(dev) && plat_node && plat_node == pci_node) {
-		of_device_unregister(to_platform_device(dev));
-		of_node_clear_flag(plat_node, OF_POPULATED);
-	}
+	pdev = of_find_device_by_node(dev_of_node(dev));
+	if (!pdev)
+		return;
 
-	return 0;
+	of_device_unregister(pdev);
+	of_node_clear_flag(dev_of_node(dev), OF_POPULATED);
 }
 
 static void pci_stop_dev(struct pci_dev *dev)
@@ -34,8 +34,7 @@  static void pci_stop_dev(struct pci_dev *dev)
 	pci_pme_active(dev, false);
 
 	if (pci_dev_is_added(dev)) {
-		device_for_each_child(dev->dev.parent, dev_of_node(&dev->dev),
-				      pci_pwrctl_unregister);
+		pci_pwrctl_unregister(&dev->dev);
 		device_release_driver(&dev->dev);
 		pci_proc_detach_device(dev);
 		pci_remove_sysfs_dev_files(dev);