[PATCH v2 0/2] of: of_device.h cleanups

[PATCH v2 0/2] of: of_device.h cleanups

[Rob Herring]

This is a couple of cleanups for of_device.h. They fell out from my
attempt at decoupling of_device.h and of_platform.h which is a mess
and I haven't finished, but there's no reason to wait on these.

Rob

Rob Herring (2):
  of: Remove of_dev_{get,put}()
  driver core: platform: Drop of_device_node_put() wrapper

 arch/powerpc/platforms/pseries/ibmebus.c |  4 ++--
 drivers/base/platform.c                  |  2 +-
 drivers/net/ethernet/ibm/emac/core.c     | 15 ++++++++-------
 drivers/of/device.c                      | 21 ---------------------
 drivers/of/platform.c                    |  4 ++--
 drivers/of/unittest.c                    |  2 +-
 drivers/usb/dwc3/dwc3-st.c               |  2 +-
 include/linux/of_device.h                | 10 ----------
 scripts/coccinelle/free/put_device.cocci |  1 -
 9 files changed, 15 insertions(+), 46 deletions(-)

-- 
2.27.0

[PATCH v2 1/2] of: Remove of_dev_{get,put}()

[Rob Herring]

of_dev_get() and of_dev_put are just wrappers for get_device()/put_device()
on a platform_device. There's also already platform_device_{get,put}()
wrappers for this purpose. Let's update the few users and remove
of_dev_{get,put}().

Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Felipe Balbi <balbi@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Julia Lawall <Julia.Lawall@inria.fr>
Cc: Gilles Muller <Gilles.Muller@inria.fr>
Cc: Nicolas Palix <nicolas.palix@imag.fr>
Cc: Michal Marek <michal.lkml@markovi.net>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: netdev@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-usb@vger.kernel.org
Cc: cocci@systeme.lip6.fr
Signed-off-by: Rob Herring <robh@kernel.org>
---
v2:
 - Fix build
---
 arch/powerpc/platforms/pseries/ibmebus.c |  4 ++--
 drivers/net/ethernet/ibm/emac/core.c     | 15 ++++++++-------
 drivers/of/device.c                      | 21 ---------------------
 drivers/of/platform.c                    |  4 ++--
 drivers/of/unittest.c                    |  2 +-
 drivers/usb/dwc3/dwc3-st.c               |  2 +-
 include/linux/of_device.h                |  3 ---
 scripts/coccinelle/free/put_device.cocci |  1 -
 8 files changed, 14 insertions(+), 38 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/ibmebus.c b/arch/powerpc/platforms/pseries/ibmebus.c
index 8c6e509f6967..a15ab33646b3 100644
--- a/arch/powerpc/platforms/pseries/ibmebus.c
+++ b/arch/powerpc/platforms/pseries/ibmebus.c
@@ -355,12 +355,12 @@ static int ibmebus_bus_device_probe(struct device *dev)
 	if (!drv->probe)
 		return error;
 
-	of_dev_get(of_dev);
+	get_device(dev);
 
 	if (of_driver_match_device(dev, dev->driver))
 		error = drv->probe(of_dev);
 	if (error)
-		of_dev_put(of_dev);
+		put_device(dev);
 
 	return error;
 }
diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c
index c00b9097eeea..471be6ec7e8a 100644
--- a/drivers/net/ethernet/ibm/emac/core.c
+++ b/drivers/net/ethernet/ibm/emac/core.c
@@ -38,6 +38,7 @@
 #include <linux/of_irq.h>
 #include <linux/of_net.h>
 #include <linux/of_mdio.h>
+#include <linux/platform_device.h>
 #include <linux/slab.h>
 
 #include <asm/processor.h>
@@ -2390,11 +2391,11 @@ static int emac_check_deps(struct emac_instance *dev,
 
 static void emac_put_deps(struct emac_instance *dev)
 {
-	of_dev_put(dev->mal_dev);
-	of_dev_put(dev->zmii_dev);
-	of_dev_put(dev->rgmii_dev);
-	of_dev_put(dev->mdio_dev);
-	of_dev_put(dev->tah_dev);
+	platform_device_put(dev->mal_dev);
+	platform_device_put(dev->zmii_dev);
+	platform_device_put(dev->rgmii_dev);
+	platform_device_put(dev->mdio_dev);
+	platform_device_put(dev->tah_dev);
 }
 
 static int emac_of_bus_notify(struct notifier_block *nb, unsigned long action,
@@ -2435,7 +2436,7 @@ static int emac_wait_deps(struct emac_instance *dev)
 	for (i = 0; i < EMAC_DEP_COUNT; i++) {
 		of_node_put(deps[i].node);
 		if (err)
-			of_dev_put(deps[i].ofdev);
+			platform_device_put(deps[i].ofdev);
 	}
 	if (err == 0) {
 		dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev;
@@ -2444,7 +2445,7 @@ static int emac_wait_deps(struct emac_instance *dev)
 		dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev;
 		dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev;
 	}
-	of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev);
+	platform_device_put(deps[EMAC_DEP_PREV_IDX].ofdev);
 	return err;
 }
 
diff --git a/drivers/of/device.c b/drivers/of/device.c
index aedfaaafd3e7..9a748855b39d 100644
--- a/drivers/of/device.c
+++ b/drivers/of/device.c
@@ -33,27 +33,6 @@ const struct of_device_id *of_match_device(const struct of_device_id *matches,
 }
 EXPORT_SYMBOL(of_match_device);
 
-struct platform_device *of_dev_get(struct platform_device *dev)
-{
-	struct device *tmp;
-
-	if (!dev)
-		return NULL;
-	tmp = get_device(&dev->dev);
-	if (tmp)
-		return to_platform_device(tmp);
-	else
-		return NULL;
-}
-EXPORT_SYMBOL(of_dev_get);
-
-void of_dev_put(struct platform_device *dev)
-{
-	if (dev)
-		put_device(&dev->dev);
-}
-EXPORT_SYMBOL(of_dev_put);
-
 int of_device_add(struct platform_device *ofdev)
 {
 	BUG_ON(ofdev->dev.of_node == NULL);
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index 79bd5f5a1bf1..020bf860c72c 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -687,7 +687,7 @@ static int of_platform_notify(struct notifier_block *nb,
 		pdev_parent = of_find_device_by_node(rd->dn->parent);
 		pdev = of_platform_device_create(rd->dn, NULL,
 				pdev_parent ? &pdev_parent->dev : NULL);
-		of_dev_put(pdev_parent);
+		platform_device_put(pdev_parent);
 
 		if (pdev == NULL) {
 			pr_err("%s: failed to create for '%pOF'\n",
@@ -712,7 +712,7 @@ static int of_platform_notify(struct notifier_block *nb,
 		of_platform_device_destroy(&pdev->dev, &children_left);
 
 		/* and put the reference of the find */
-		of_dev_put(pdev);
+		platform_device_put(pdev);
 		break;
 	}
 
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index eb51bc147440..eb100627c186 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1286,7 +1286,7 @@ static void __init of_unittest_platform_populate(void)
 			unittest(pdev,
 				 "Could not create device for node '%pOFn'\n",
 				 grandchild);
-			of_dev_put(pdev);
+			platform_device_put(pdev);
 		}
 	}
 
diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c
index e733be840545..b06b7092b1a2 100644
--- a/drivers/usb/dwc3/dwc3-st.c
+++ b/drivers/usb/dwc3/dwc3-st.c
@@ -274,7 +274,7 @@ static int st_dwc3_probe(struct platform_device *pdev)
 
 	dwc3_data->dr_mode = usb_get_dr_mode(&child_pdev->dev);
 	of_node_put(child);
-	of_dev_put(child_pdev);
+	platform_device_put(child_pdev);
 
 	/*
 	 * Configure the USB port as device or host according to the static
diff --git a/include/linux/of_device.h b/include/linux/of_device.h
index 937f32f6aecb..d7a407dfeecb 100644
--- a/include/linux/of_device.h
+++ b/include/linux/of_device.h
@@ -26,9 +26,6 @@ static inline int of_driver_match_device(struct device *dev,
 	return of_match_device(drv->of_match_table, dev) != NULL;
 }
 
-extern struct platform_device *of_dev_get(struct platform_device *dev);
-extern void of_dev_put(struct platform_device *dev);
-
 extern int of_device_add(struct platform_device *pdev);
 extern int of_device_register(struct platform_device *ofdev);
 extern void of_device_unregister(struct platform_device *ofdev);
diff --git a/scripts/coccinelle/free/put_device.cocci b/scripts/coccinelle/free/put_device.cocci
index 120921366e84..f09f1e79bfa6 100644
--- a/scripts/coccinelle/free/put_device.cocci
+++ b/scripts/coccinelle/free/put_device.cocci
@@ -21,7 +21,6 @@ id = of_find_device_by_node@p1(x)
 if (id == NULL || ...) { ... return ...; }
 ... when != put_device(&id->dev)
     when != platform_device_put(id)
-    when != of_dev_put(id)
     when != if (id) { ... put_device(&id->dev) ... }
     when != e1 = (T)id
     when != e1 = (T)(&id->dev)
-- 
2.27.0

[PATCH v2 2/2] driver core: platform: Drop of_device_node_put() wrapper

[Rob Herring]

of_device_node_put() is just a wrapper for of_node_put(). The platform
driver core is already polluted with of_node pointers and the only 'get'
already uses of_node_get() (though typically the get would happen in
of_device_alloc()).

Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
v2:
 - Fix build
---
 drivers/base/platform.c   | 2 +-
 include/linux/of_device.h | 7 -------
 2 files changed, 1 insertion(+), 8 deletions(-)

diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 95fd1549f87d..9d5171e5f967 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -571,7 +571,7 @@ static void platform_device_release(struct device *dev)
 	struct platform_object *pa = container_of(dev, struct platform_object,
 						  pdev.dev);
 
-	of_device_node_put(&pa->pdev.dev);
+	of_node_put(pa->pdev.dev.of_node);
 	kfree(pa->pdev.dev.platform_data);
 	kfree(pa->pdev.mfd_cell);
 	kfree(pa->pdev.resource);
diff --git a/include/linux/of_device.h b/include/linux/of_device.h
index d7a407dfeecb..1d7992a02e36 100644
--- a/include/linux/of_device.h
+++ b/include/linux/of_device.h
@@ -38,11 +38,6 @@ extern int of_device_request_module(struct device *dev);
 extern void of_device_uevent(struct device *dev, struct kobj_uevent_env *env);
 extern int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env);
 
-static inline void of_device_node_put(struct device *dev)
-{
-	of_node_put(dev->of_node);
-}
-
 static inline struct device_node *of_cpu_device_node_get(int cpu)
 {
 	struct device *cpu_dev;
@@ -94,8 +89,6 @@ static inline int of_device_uevent_modalias(struct device *dev,
 	return -ENODEV;
 }
 
-static inline void of_device_node_put(struct device *dev) { }
-
 static inline const struct of_device_id *of_match_device(
 		const struct of_device_id *matches, const struct device *dev)
 {
-- 
2.27.0

Re: [PATCH v2 0/2] of: of_device.h cleanups

[Greg Kroah-Hartman]

On Thu, Feb 11, 2021 at 05:27:43PM -0600, Rob Herring wrote:
> This is a couple of cleanups for of_device.h. They fell out from my
> attempt at decoupling of_device.h and of_platform.h which is a mess
> and I haven't finished, but there's no reason to wait on these.

Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>