diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2005-11-17 17:10:32 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-01-04 13:48:34 -0800 |
| commit | 9ad3d6ccf5eee285e233dbaf186369b8d477a666 (patch) | |
| tree | 4ad43518e01f1b2c6513e79b318d974979041b99 /drivers/usb/core/devio.c | |
| parent | 75318d2d7cab77b14c5d3dbd5e69f2680a769e16 (diff) | |
[PATCH] USB: Remove USB private semaphore
This patch (as605) removes the private udev->serialize semaphore,
relying instead on the locking provided by the embedded struct device's
semaphore. The changes are confined to the core, except that the
usb_trylock_device routine now uses the return convention of
down_trylock rather than down_read_trylock (they return opposite values
for no good reason).
A couple of other associated changes are included as well:
Now that we aren't concerned about HCDs that avoid using the
hcd glue layer, usb_disconnect no longer needs to acquire the
usb_bus_lock -- that can be done by usb_remove_hcd where it
belongs.
Devices aren't locked over the same scope of code in
usb_new_device and hub_port_connect_change as they used to be.
This shouldn't cause any trouble.
Along with the preceding driver core patch, this needs a lot of testing.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core/devio.c')
| -rw-r--r-- | drivers/usb/core/devio.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 3a73170e95d..2b68998fe4b 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1349,9 +1349,7 @@ static int proc_ioctl(struct dev_state *ps, struct usbdevfs_ioctl *ctl) /* let kernel drivers try to (re)bind to the interface */ case USBDEVFS_CONNECT: usb_unlock_device(ps->dev); - usb_lock_all_devices(); bus_rescan_devices(intf->dev.bus); - usb_unlock_all_devices(); usb_lock_device(ps->dev); break; |