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authorBjorn Helgaas <bjorn.helgaas@hp.com>2006-03-25 03:07:17 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 08:22:53 -0800
commite51c01b08474ea454a965a937fff0407ab6714c7 (patch)
tree403e22aa86b4a24699df7cc1285ab915ec3eda1a /drivers/dio
parent5930860296ca438071d3824bf7306ad0dfd33fc1 (diff)
downloadlinux-2.6.34-ux500-e51c01b08474ea454a965a937fff0407ab6714c7.tar.gz
[PATCH] hp300: fix driver_register() return handling, remove dio_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. dio_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 dio_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 <bjorn.helgaas@hp.com> Cc: Philip Blundell <philb@gnu.org> Cc: Jochen Friedrich <jochen@scram.de> Cc: "Antonino A. Daplas" <adaplas@pol.net> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/dio')
-rw-r--r--drivers/dio/dio-driver.c9
1 files changed, 2 insertions, 7 deletions
diff --git a/drivers/dio/dio-driver.c b/drivers/dio/dio-driver.c
index ca8e69d2f64..e4c48e32936 100644
--- a/drivers/dio/dio-driver.c
+++ b/drivers/dio/dio-driver.c
@@ -71,22 +71,17 @@ static int dio_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 DIO 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 dio_register_driver(struct dio_driver *drv)
{
- int count = 0;
-
/* initialize common driver fields */
drv->driver.name = drv->name;
drv->driver.bus = &dio_bus_type;
/* register with core */
- count = driver_register(&drv->driver);
- return count ? count : 1;
+ return driver_register(&drv->driver);
}