[patch 0/2] Add platform_device_del()

[patch 0/2] Add platform_device_del()

[Dmitry Torokhov]

Hi,

OK, so here is the patch adding platform_device_del() that we were
discussing. The second patch just moves exports around so we do not
mix two styles in one source file.

Greg, if you are OK with it - are you going to push it or maybe I
should put it in my tree so I can publish pieces depending on this
as they are getting ready?

--
Dmitry

[patch 1/2] Add platform_device_del()

[Dmitry Torokhov]

[-- Attachment #1: platform-device-del.patch --]
[-- Type: text/plain, Size: 3207 bytes --]

Driver core: add platform_device_del function

Having platform_device_del90 allows more straightforward error
handling code in drivers registering platform devices.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

 drivers/base/platform.c         |   45 ++++++++++++++++++++++++++--------------
 include/linux/platform_device.h |    1 
 2 files changed, 31 insertions(+), 15 deletions(-)

Index: work/drivers/base/platform.c
===================================================================
--- work.orig/drivers/base/platform.c
+++ work/drivers/base/platform.c
@@ -168,7 +168,7 @@ struct platform_device *platform_device_
 		pa->pdev.dev.release = platform_device_release;
 	}
 
-	return pa ? &pa->pdev : NULL;	
+	return pa ? &pa->pdev : NULL;
 }
 EXPORT_SYMBOL_GPL(platform_device_alloc);
 
@@ -282,24 +282,13 @@ int platform_device_add(struct platform_
 EXPORT_SYMBOL_GPL(platform_device_add);
 
 /**
- *	platform_device_register - add a platform-level device
- *	@pdev:	platform device we're adding
- *
- */
-int platform_device_register(struct platform_device * pdev)
-{
-	device_initialize(&pdev->dev);
-	return platform_device_add(pdev);
-}
-
-/**
- *	platform_device_unregister - remove a platform-level device
+ *	platform_device_del - remove a platform-level device
  *	@pdev:	platform device we're removing
  *
  *	Note that this function will also release all memory- and port-based
  *	resources owned by the device (@dev->resource).
  */
-void platform_device_unregister(struct platform_device * pdev)
+void platform_device_del(struct platform_device *pdev)
 {
 	int i;
 
@@ -310,9 +299,35 @@ void platform_device_unregister(struct p
 				release_resource(r);
 		}
 
-		device_unregister(&pdev->dev);
+		device_del(&pdev->dev);
 	}
 }
+EXPORT_SYMBOL_GPL(platform_device_del);
+
+/**
+ *	platform_device_register - add a platform-level device
+ *	@pdev:	platform device we're adding
+ *
+ */
+int platform_device_register(struct platform_device * pdev)
+{
+	device_initialize(&pdev->dev);
+	return platform_device_add(pdev);
+}
+
+/**
+ *	platform_device_unregister - unregister a platform-level device
+ *	@pdev:	platform device we're unregistering
+ *
+ *	Unregistration is done in 2 steps. Fisrt we release all resources
+ *	and remove it from the sybsystem, then we drop reference count by
+ *	calling platform_device_put().
+ */
+void platform_device_unregister(struct platform_device * pdev)
+{
+	platform_device_del(pdev);
+	platform_device_put(pdev);
+}
 
 /**
  *	platform_device_register_simple
Index: work/include/linux/platform_device.h
===================================================================
--- work.orig/include/linux/platform_device.h
+++ work/include/linux/platform_device.h
@@ -41,6 +41,7 @@ extern struct platform_device *platform_
 extern int platform_device_add_resources(struct platform_device *pdev, struct resource *res, unsigned int num);
 extern int platform_device_add_data(struct platform_device *pdev, void *data, size_t size);
 extern int platform_device_add(struct platform_device *pdev);
+extern void platform_device_del(struct platform_device *pdev);
 extern void platform_device_put(struct platform_device *pdev);
 
 struct platform_driver {

[patch 2/2] Rearrange exports in platform.c

[Dmitry Torokhov]

[-- Attachment #1: platform-rearange-exports.patch --]
[-- Type: text/plain, Size: 3076 bytes --]

Driver core: rearrange exports in platform.c

The new way is to specify export right after symbol definition.
Rearrange exports to follow new style to avoid mixing two styles
in one file.

Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
---

 drivers/base/platform.c |   21 ++++++++++-----------
 1 files changed, 10 insertions(+), 11 deletions(-)

Index: work/drivers/base/platform.c
===================================================================
--- work.orig/drivers/base/platform.c
+++ work/drivers/base/platform.c
@@ -25,6 +25,7 @@
 struct device platform_bus = {
 	.bus_id		= "platform",
 };
+EXPORT_SYMBOL_GPL(platform_bus);
 
 /**
  *	platform_get_resource - get a resource for a device
@@ -49,6 +50,7 @@ platform_get_resource(struct platform_de
 	}
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(platform_get_resource);
 
 /**
  *	platform_get_irq - get an IRQ for a device
@@ -61,6 +63,7 @@ int platform_get_irq(struct platform_dev
 
 	return r ? r->start : 0;
 }
+EXPORT_SYMBOL_GPL(platform_get_irq);
 
 /**
  *	platform_get_resource_byname - get a resource for a device by name
@@ -84,6 +87,7 @@ platform_get_resource_byname(struct plat
 	}
 	return NULL;
 }
+EXPORT_SYMBOL_GPL(platform_get_resource_byname);
 
 /**
  *	platform_get_irq - get an IRQ for a device
@@ -96,6 +100,7 @@ int platform_get_irq_byname(struct platf
 
 	return r ? r->start : 0;
 }
+EXPORT_SYMBOL_GPL(platform_get_irq_byname);
 
 /**
  *	platform_add_devices - add a numbers of platform devices
@@ -117,6 +122,7 @@ int platform_add_devices(struct platform
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(platform_add_devices);
 
 struct platform_object {
 	struct platform_device pdev;
@@ -314,6 +320,7 @@ int platform_device_register(struct plat
 	device_initialize(&pdev->dev);
 	return platform_device_add(pdev);
 }
+EXPORT_SYMBOL_GPL(platform_device_register);
 
 /**
  *	platform_device_unregister - unregister a platform-level device
@@ -328,6 +335,7 @@ void platform_device_unregister(struct p
 	platform_device_del(pdev);
 	platform_device_put(pdev);
 }
+EXPORT_SYMBOL_GPL(platform_device_unregister);
 
 /**
  *	platform_device_register_simple
@@ -370,6 +378,7 @@ error:
 	platform_device_put(pdev);
 	return ERR_PTR(retval);
 }
+EXPORT_SYMBOL_GPL(platform_device_register_simple);
 
 static int platform_drv_probe(struct device *_dev)
 {
@@ -491,6 +500,7 @@ struct bus_type platform_bus_type = {
 	.suspend	= platform_suspend,
 	.resume		= platform_resume,
 };
+EXPORT_SYMBOL_GPL(platform_bus_type);
 
 int __init platform_bus_init(void)
 {
@@ -519,14 +529,3 @@ u64 dma_get_required_mask(struct device 
 }
 EXPORT_SYMBOL_GPL(dma_get_required_mask);
 #endif
-
-EXPORT_SYMBOL_GPL(platform_bus);
-EXPORT_SYMBOL_GPL(platform_bus_type);
-EXPORT_SYMBOL_GPL(platform_add_devices);
-EXPORT_SYMBOL_GPL(platform_device_register);
-EXPORT_SYMBOL_GPL(platform_device_register_simple);
-EXPORT_SYMBOL_GPL(platform_device_unregister);
-EXPORT_SYMBOL_GPL(platform_get_irq);
-EXPORT_SYMBOL_GPL(platform_get_resource);
-EXPORT_SYMBOL_GPL(platform_get_irq_byname);
-EXPORT_SYMBOL_GPL(platform_get_resource_byname);

Re: [patch 1/2] Add platform_device_del()

[Jean Delvare]

Hi Dmirty,

> Driver core: add platform_device_del function
> 
> Having platform_device_del90 allows more straightforward error
> handling code in drivers registering platform devices.
> (...)
> +/**
> + *	platform_device_unregister - unregister a platform-level device
> + *	@pdev:	platform device we're unregistering
> + *
> + *	Unregistration is done in 2 steps. Fisrt we release all resources
> + *	and remove it from the sybsystem, then we drop reference count by

Typo: subsystem.

> + *	calling platform_device_put().
> + */

Other than that, and let alone the fact that I prefer code cleanups as
separate patches, and the fact that I don't think moving
platform_device_register() around adds much value, this patch looks
good to me.

Thanks,
-- 
Jean Delvare

Re: [patch 1/2] Add platform_device_del()

[Dmitry Torokhov]

Hi Jean,

On Saturday 10 December 2005 11:58, Jean Delvare wrote:
> Hi Dmirty,
> 
> > Driver core: add platform_device_del function
> > 
> > Having platform_device_del90 allows more straightforward error
> > handling code in drivers registering platform devices.
> > (...)
> > +/**
> > + *	platform_device_unregister - unregister a platform-level device
> > + *	@pdev:	platform device we're unregistering
> > + *
> > + *	Unregistration is done in 2 steps. Fisrt we release all resources
> > + *	and remove it from the sybsystem, then we drop reference count by
> 
> Typo: subsystem.

Will fix, thank you for noticing.

> 
> > + *	calling platform_device_put().
> > + */
> 
> Other than that, and let alone the fact that I prefer code cleanups as
> separate patches, and the fact that I don't think moving
> platform_device_register() around adds much value, this patch looks
> good to me.
>

It was not moved ;) platform_device_register() is and was in front of
platform_device_unregister. But because the new platform_device_del()
reused most of the platform_device_unregister() body patch plays a trick
on you making you believe that some code was moved around.

-- 
Dmitry