[PATCH v2 19/19] driver core: platform: count references to all kinds of firmware nodes
From: Bartosz Golaszewski <hidden>
Date: 2026-06-29 09:14:27
Also in:
dri-devel, driver-core, imx, intel-xe, linux-arm-msm, linux-devicetree, linux-i2c, linux-iommu, linux-mips, linux-pm, linux-sound, linux-usb, lkml, netdev, platform-driver-x86
Subsystem:
driver core, kobjects, debugfs and sysfs, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
When using platform_device_register_full(), we currently only increase the reference count of the OF node associated with a platform device. We symmetrically decrease it in platform_device_release(). With all users in tree now converted to using provided platform device helpers for assigning OF and firmware nodes, we can now switch to counting references of all kinds of firmware nodes. Signed-off-by: Bartosz Golaszewski <redacted> --- drivers/base/platform.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index f24a5f406746b53ca9eaab9472f6dd1345e04ad6..bb5f5bddd047d4ec6f238e36dfe4f4ea36b92a76 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c@@ -599,7 +599,7 @@ static void platform_device_release(struct device *dev) struct platform_object *pa = container_of(dev, struct platform_object, pdev.dev); - of_node_put(pa->pdev.dev.of_node); + fwnode_handle_put(pa->pdev.dev.fwnode); kfree(pa->pdev.dev.platform_data); kfree(pa->pdev.mfd_cell); kfree(pa->pdev.resource);
@@ -705,9 +705,7 @@ EXPORT_SYMBOL_GPL(platform_device_add_data); void platform_device_set_of_node(struct platform_device *pdev, struct device_node *np) { - of_node_put(pdev->dev.of_node); - pdev->dev.of_node = of_node_get(np); - pdev->dev.fwnode = of_fwnode_handle(np); + platform_device_set_fwnode(pdev, of_fwnode_handle(np)); } EXPORT_SYMBOL_GPL(platform_device_set_of_node);
@@ -723,10 +721,9 @@ EXPORT_SYMBOL_GPL(platform_device_set_of_node); void platform_device_set_fwnode(struct platform_device *pdev, struct fwnode_handle *fwnode) { - if (is_of_node(fwnode)) - platform_device_set_of_node(pdev, to_of_node(fwnode)); - else - pdev->dev.fwnode = fwnode; + fwnode_handle_put(pdev->dev.fwnode); + pdev->dev.fwnode = fwnode_handle_get(fwnode); + pdev->dev.of_node = to_of_node(fwnode); } EXPORT_SYMBOL_GPL(platform_device_set_fwnode);
@@ -921,8 +918,8 @@ struct platform_device *platform_device_register_full(const struct platform_devi return ERR_PTR(-ENOMEM); pdev->dev.parent = pdevinfo->parent; - pdev->dev.fwnode = pdevinfo->fwnode; - pdev->dev.of_node = of_node_get(to_of_node(pdev->dev.fwnode)); + pdev->dev.fwnode = fwnode_handle_get(pdevinfo->fwnode); + pdev->dev.of_node = to_of_node(pdev->dev.fwnode); dev_assign_of_node_reused(&pdev->dev, pdevinfo->of_node_reused); if (pdevinfo->dma_mask) {
--
2.47.3