Commit 4452e8ef authored by Heiko Carstens's avatar Heiko Carstens Committed by Alexander Gordeev
Browse files

s390/iucv: Provide iucv_alloc_device() / iucv_release_device() 



Provide iucv_alloc_device() and iucv_release_device() helper functions,
which can be used to deduplicate more or less identical IUCV device
allocation and release code in four different drivers.

Suggested-by: default avatarArnd Bergmann <arnd@arndb.de>
Acked-by: default avatarAlexandra Winter <wintera@linux.ibm.com>
Link: https://lore.kernel.org/r/20240506194454.1160315-2-hca@linux.ibm.com


Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
parent 1084562e

include/net/iucv/iucv.h

+6 −0
Original line number Diff line number Diff line
@@ -84,6 +84,12 @@ struct iucv_array { 
extern const struct bus_type iucv_bus;

extern struct device *iucv_root;



struct device_driver;



struct device *iucv_alloc_device(const struct attribute_group **attrs,

				 struct device_driver *driver, void *priv,

				 const char *fmt, ...) __printf(4, 5);



/*

 * struct iucv_path

 * pathid: 16 bit path identification

net/iucv/iucv.c

+35 −0
Original line number Diff line number Diff line
@@ -76,6 +76,41 @@ EXPORT_SYMBOL(iucv_bus); 
struct device *iucv_root;

EXPORT_SYMBOL(iucv_root);



static void iucv_release_device(struct device *device)

{

	kfree(device);

}



struct device *iucv_alloc_device(const struct attribute_group **attrs,

				 struct device_driver *driver,

				 void *priv, const char *fmt, ...)

{

	struct device *dev;

	va_list vargs;

	int rc;



	dev = kzalloc(sizeof(*dev), GFP_KERNEL);

	if (!dev)

		goto out_error;

	va_start(vargs, fmt);

	rc = dev_set_name(dev, fmt, vargs);

	va_end(vargs);

	if (rc)

		goto out_error;

	dev->bus = &iucv_bus;

	dev->parent = iucv_root;

	dev->driver = driver;

	dev->groups = attrs;

	dev->release = iucv_release_device;

	dev_set_drvdata(dev, priv);

	return dev;



out_error:

	kfree(dev);

	return NULL;

}

EXPORT_SYMBOL(iucv_alloc_device);



static int iucv_available;



/* General IUCV interrupt structure */