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Subject[patch 1/1] 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: Laurent Riffard <laurent.riffard@free.fr>
--

drivers/ide/setup-pci.c | 12 +++++++-----
drivers/pci/pci-driver.c | 9 +++++----
include/linux/ide.h | 3 ++-
include/linux/pci.h | 5 +++--
4 files changed, 17 insertions(+), 12 deletions(-)

Index: linux-2.6-stable/include/linux/pci.h
===================================================================
--- linux-2.6-stable.orig/include/linux/pci.h
+++ linux-2.6-stable/include/linux/pci.h
@@ -857,7 +857,8 @@
void pci_enable_bridges(struct pci_bus *bus);

/* New-style probing supporting hot-pluggable devices */
-int pci_register_driver(struct pci_driver *);
+int __pci_register_driver(struct pci_driver *, struct module *);
+#define pci_register_driver(d) __pci_register_driver(d, 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 *);
@@ -957,7 +958,7 @@
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) { return 0;}
+static inline int __pci_register_driver(struct pci_driver *drv, struct module *owner) { 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; }
static inline int pci_find_ext_capability (struct pci_dev *dev, int cap) {return 0; }
Index: linux-2.6-stable/drivers/pci/pci-driver.c
===================================================================
--- linux-2.6-stable.orig/drivers/pci/pci-driver.c
+++ linux-2.6-stable/drivers/pci/pci-driver.c
@@ -325,15 +325,16 @@
};

/**
- * 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;

@@ -346,7 +347,7 @@
* the pci shutdown function, this test can go away. */
if (!drv->driver.shutdown)
drv->driver.shutdown = pci_device_shutdown;
- drv->driver.owner = drv->owner;
+ drv->driver.owner = owner;
drv->driver.kobj.ktype = &pci_driver_kobj_type;

spin_lock_init(&drv->dynids.lock);
@@ -483,7 +484,7 @@

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);
Index: linux-2.6-stable/drivers/ide/setup-pci.c
===================================================================
--- linux-2.6-stable.orig/drivers/ide/setup-pci.c
+++ linux-2.6-stable/drivers/ide/setup-pci.c
@@ -787,8 +787,9 @@
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 @@
* 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 @@
{
list_del(l);
d = list_entry(l, struct pci_driver, node);
- pci_register_driver(d);
+ __pci_register_driver(d, d->driver.owner);
}
}
Index: linux-2.6-stable/include/linux/ide.h
===================================================================
--- linux-2.6-stable.orig/include/linux/ide.h
+++ linux-2.6-stable/include/linux/ide.h
@@ -1324,7 +1324,8 @@
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);
--

-
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