Commit 863b18f4 authored by Laurent riffard's avatar Laurent riffard Committed by Greg Kroah-Hartman
Browse files

[PATCH] PCI: automatically set device_driver.owner 



A nice feature of sysfs is that it can create the symlink from the
driver to the module that is contained in it.

It requires that the device_driver.owner is set, what is not the
case for many PCI drivers.

This patch allows pci_register_driver to set automatically the
device_driver.owner for any PCI driver.

Credits to Al Viro who suggested the method.

Signed-off-by: default avatarLaurent Riffard <laurent.riffard@free.fr>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
--

 drivers/ide/setup-pci.c  |   12 +++++++-----
 drivers/pci/pci-driver.c |    9 +++++----
 include/linux/ide.h      |    3 ++-
 include/linux/pci.h      |   10 ++++++++--
 4 files changed, 22 insertions(+), 12 deletions(-)
parent f8eb1005

drivers/ide/setup-pci.c

+7 −5
Original line number Diff line number Diff line
@@ -787,8 +787,9 @@ static int pre_init = 1; /* Before first ordered IDE scan */ 
static LIST_HEAD(ide_pci_drivers);



/*

 *	ide_register_pci_driver		-	attach IDE driver

 *	__ide_register_pci_driver	-	attach IDE driver

 *	@driver: pci driver

 *	@module: owner module of the driver

 *

 *	Registers a driver with the IDE layer. The IDE layer arranges that

 *	boot time setup is done in the expected device order and then
@@ -801,15 +802,16 @@ static LIST_HEAD(ide_pci_drivers); 
 *	Returns are the same as for pci_register_driver

 */



int ide_pci_register_driver(struct pci_driver *driver)

int __ide_pci_register_driver(struct pci_driver *driver, struct module *module)

{

	if(!pre_init)

		return pci_module_init(driver);

		return __pci_register_driver(driver, module);

	driver->driver.owner = module;

	list_add_tail(&driver->node, &ide_pci_drivers);

	return 0;

}



EXPORT_SYMBOL_GPL(ide_pci_register_driver);

EXPORT_SYMBOL_GPL(__ide_pci_register_driver);



/**

 *	ide_unregister_pci_driver	-	unregister an IDE driver
@@ -897,6 +899,6 @@ void __init ide_scan_pcibus (int scan_direction) 
	{

		list_del(l);

		d = list_entry(l, struct pci_driver, node);

		pci_register_driver(d);

		__pci_register_driver(d, d->driver.owner);

	}

}

drivers/pci/pci-driver.c

+5 −4
Original line number Diff line number Diff line
@@ -364,15 +364,16 @@ static struct kobj_type pci_driver_kobj_type = { 
};



/**

 * pci_register_driver - register a new pci driver

 * __pci_register_driver - register a new pci driver

 * @drv: the driver structure to register

 * @owner: owner module of drv

 * 

 * Adds the driver structure to the list of registered drivers.

 * Returns a negative value on error, otherwise 0. 

 * If no error occurred, the driver remains registered even if 

 * no device was claimed during registration.

 */

int pci_register_driver(struct pci_driver *drv)

int __pci_register_driver(struct pci_driver *drv, struct module *owner)

{

	int error;
@@ -389,7 +390,7 @@ int pci_register_driver(struct pci_driver *drv) 
		printk(KERN_WARNING "Warning: PCI driver %s has a struct "

			"device_driver shutdown method, please update!\n",

			drv->name);

	drv->driver.owner = drv->owner;

	drv->driver.owner = owner;

	drv->driver.kobj.ktype = &pci_driver_kobj_type;



	spin_lock_init(&drv->dynids.lock);
@@ -526,7 +527,7 @@ postcore_initcall(pci_driver_init); 


EXPORT_SYMBOL(pci_match_id);

EXPORT_SYMBOL(pci_match_device);

EXPORT_SYMBOL(pci_register_driver);

EXPORT_SYMBOL(__pci_register_driver);

EXPORT_SYMBOL(pci_unregister_driver);

EXPORT_SYMBOL(pci_dev_driver);

EXPORT_SYMBOL(pci_bus_type);

include/linux/ide.h

+2 −1
Original line number Diff line number Diff line
@@ -1329,7 +1329,8 @@ void ide_init_disk(struct gendisk *, ide_drive_t *); 
extern int ideprobe_init(void);



extern void ide_scan_pcibus(int scan_direction) __init;

extern int ide_pci_register_driver(struct pci_driver *driver);

extern int __ide_pci_register_driver(struct pci_driver *driver, struct module *owner);

#define ide_pci_register_driver(d) __ide_pci_register_driver(d, THIS_MODULE)

extern void ide_pci_unregister_driver(struct pci_driver *driver);

void ide_pci_setup_ports(struct pci_dev *, struct ide_pci_device_s *, int, ata_index_t *);

extern void ide_setup_pci_noise (struct pci_dev *dev, struct ide_pci_device_s *d);

include/linux/pci.h

+8 −2
Original line number Diff line number Diff line
@@ -433,8 +433,13 @@ int pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res, 
			   void *alignf_data);

void pci_enable_bridges(struct pci_bus *bus);



/* New-style probing supporting hot-pluggable devices */

int pci_register_driver(struct pci_driver *);

/* Proper probing supporting hot-pluggable devices */

int __pci_register_driver(struct pci_driver *, struct module *);

static inline int pci_register_driver(struct pci_driver *driver)

{

	return __pci_register_driver(driver, THIS_MODULE);

}



void pci_unregister_driver(struct pci_driver *);

void pci_remove_behind_bridge(struct pci_dev *);

struct pci_driver *pci_dev_driver(const struct pci_dev *);
@@ -548,6 +553,7 @@ static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; } 
static inline void pci_disable_device(struct pci_dev *dev) { }

static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask) { return -EIO; }

static inline int pci_assign_resource(struct pci_dev *dev, int i) { return -EBUSY;}

static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { return 0;}

static inline int pci_register_driver(struct pci_driver *drv) { return 0;}

static inline void pci_unregister_driver(struct pci_driver *drv) { }

static inline int pci_find_capability (struct pci_dev *dev, int cap) {return 0; }

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