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| author | Moore, Eric <Eric.Moore@lsil.com> | 2006-03-14 17:18:18 +0100 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2006-03-14 19:50:44 +0100 |
| commit | e935d5da8e5d12fabe5b632736c50eae0427e8c8 (patch) | |
| tree | 8045ffcaa659365ed1d844e7704b92810660c8b1 /drivers/base | |
| parent | [SCSI] add preliminary expander support to the sas transport class (diff) | |
| download | linux-e935d5da8e5d12fabe5b632736c50eae0427e8c8.tar.xz linux-e935d5da8e5d12fabe5b632736c50eae0427e8c8.zip | |
[SCSI] drivers/base/bus.c - export reprobe
Adding support for exposing hidden raid components for sg
interface. The sdev->no_uld_attach flag will set set accordingly.
The sas module supports adding/removing raid volumes using online
storage management application interface.
This patch was provided to me by Christoph Hellwig.
Signed-off-by: Eric Moore <Eric.Moore@lsil.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/bus.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c index c3141565d59d..48718b7f4fa0 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -536,6 +536,28 @@ void bus_rescan_devices(struct bus_type * bus) bus_for_each_dev(bus, NULL, NULL, bus_rescan_devices_helper); } +/** + * device_reprobe - remove driver for a device and probe for a new driver + * @dev: the device to reprobe + * + * This function detaches the attached driver (if any) for the given + * device and restarts the driver probing process. It is intended + * to use if probing criteria changed during a devices lifetime and + * driver attachment should change accordingly. + */ +void device_reprobe(struct device *dev) +{ + if (dev->driver) { + if (dev->parent) /* Needed for USB */ + down(&dev->parent->sem); + device_release_driver(dev); + if (dev->parent) + up(&dev->parent->sem); + } + + bus_rescan_devices_helper(dev, NULL); +} +EXPORT_SYMBOL_GPL(device_reprobe); struct bus_type * get_bus(struct bus_type * bus) { |