From: Bjorn Helgaas Date: Sat, 25 Mar 2006 11:07:20 +0000 (-0800) Subject: [PATCH] amiga: fix driver_register() return handling, remove zorro_module_init() X-Git-Tag: v2.6.17-rc1~815 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=33d8675ea66e79d21da3ed64ce88dfb2a18bc6a7;p=platform%2Fupstream%2Fkernel-adaptation-pc.git [PATCH] amiga: fix driver_register() return handling, remove zorro_module_init() Remove the assumption that driver_register() returns the number of devices bound to the driver. In fact, it returns zero for success or a negative error value. zorro_module_init() used the device count to automatically unregister and unload drivers that found no devices. That might have worked at one time, but has been broken for some time because zorro_register_driver() returned either a negative error or a positive count (never zero). So it could only unregister on failure, when it's not needed anyway. This functionality could be resurrected in individual drivers by counting devices in their .probe() methods. Signed-off-by: Bjorn Helgaas Cc: Geert Uytterhoeven Cc: Roman Zippel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/net/a2065.c b/drivers/net/a2065.c index 8e538a6..79bb56b 100644 --- a/drivers/net/a2065.c +++ b/drivers/net/a2065.c @@ -829,7 +829,7 @@ static void __devexit a2065_remove_one(struct zorro_dev *z) static int __init a2065_init_module(void) { - return zorro_module_init(&a2065_driver); + return zorro_register_driver(&a2065_driver); } static void __exit a2065_cleanup_module(void) diff --git a/drivers/net/ariadne.c b/drivers/net/ariadne.c index 9fe93ac..d1b6b1f 100644 --- a/drivers/net/ariadne.c +++ b/drivers/net/ariadne.c @@ -864,7 +864,7 @@ static void __devexit ariadne_remove_one(struct zorro_dev *z) static int __init ariadne_init_module(void) { - return zorro_module_init(&ariadne_driver); + return zorro_register_driver(&ariadne_driver); } static void __exit ariadne_cleanup_module(void) diff --git a/drivers/net/hydra.c b/drivers/net/hydra.c index 6e0ca73..d9fb8e7 100644 --- a/drivers/net/hydra.c +++ b/drivers/net/hydra.c @@ -242,7 +242,7 @@ static void __devexit hydra_remove_one(struct zorro_dev *z) static int __init hydra_init_module(void) { - return zorro_module_init(&hydra_driver); + return zorro_register_driver(&hydra_driver); } static void __exit hydra_cleanup_module(void) diff --git a/drivers/net/zorro8390.c b/drivers/net/zorro8390.c index 7610216..8037e58 100644 --- a/drivers/net/zorro8390.c +++ b/drivers/net/zorro8390.c @@ -426,7 +426,7 @@ static void __devexit zorro8390_remove_one(struct zorro_dev *z) static int __init zorro8390_init_module(void) { - return zorro_module_init(&zorro8390_driver); + return zorro_register_driver(&zorro8390_driver); } static void __exit zorro8390_cleanup_module(void) diff --git a/drivers/video/cirrusfb.c b/drivers/video/cirrusfb.c index e0dbdfc..66d6f2f 100644 --- a/drivers/video/cirrusfb.c +++ b/drivers/video/cirrusfb.c @@ -2622,7 +2622,7 @@ static int __init cirrusfb_init(void) #endif #ifdef CONFIG_ZORRO - error |= zorro_module_init(&cirrusfb_zorro_driver); + error |= zorro_register_driver(&cirrusfb_zorro_driver); #endif #ifdef CONFIG_PCI error |= pci_register_driver(&cirrusfb_pci_driver); diff --git a/drivers/zorro/zorro-driver.c b/drivers/zorro/zorro-driver.c index fcbee74..067c07b 100644 --- a/drivers/zorro/zorro-driver.c +++ b/drivers/zorro/zorro-driver.c @@ -65,22 +65,17 @@ static int zorro_device_probe(struct device *dev) * @drv: the driver structure to register * * Adds the driver structure to the list of registered drivers - * Returns the number of Zorro devices which were claimed by the driver - * during registration. The driver remains registered even if the - * return value is zero. + * Returns zero or a negative error value. */ int zorro_register_driver(struct zorro_driver *drv) { - int count = 0; - /* initialize common driver fields */ drv->driver.name = drv->name; drv->driver.bus = &zorro_bus_type; /* register with core */ - count = driver_register(&drv->driver); - return count ? count : 1; + return driver_register(&drv->driver); } diff --git a/include/linux/zorro.h b/include/linux/zorro.h index ba5b727..2f135cf 100644 --- a/include/linux/zorro.h +++ b/include/linux/zorro.h @@ -271,39 +271,6 @@ static inline void zorro_set_drvdata (struct zorro_dev *z, void *data) } -/* - * A helper function which helps ensure correct zorro_driver - * setup and cleanup for commonly-encountered hotplug/modular cases - * - * This MUST stay in a header, as it checks for -DMODULE - */ -static inline int zorro_module_init(struct zorro_driver *drv) -{ - int rc = zorro_register_driver(drv); - - if (rc > 0) - return 0; - - /* iff CONFIG_HOTPLUG and built into kernel, we should - * leave the driver around for future hotplug events. - * For the module case, a hotplug daemon of some sort - * should load a module in response to an insert event. */ -#if defined(CONFIG_HOTPLUG) && !defined(MODULE) - if (rc == 0) - return 0; -#else - if (rc == 0) - rc = -ENODEV; -#endif - - /* if we get here, we need to clean up Zorro driver instance - * and return some sort of error */ - zorro_unregister_driver(drv); - - return rc; -} - - /* * Bitmask indicating portions of available Zorro II RAM that are unused * by the system. Every bit represents a 64K chunk, for a maximum of 8MB