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| author | Alan Stern <stern@rowland.harvard.edu> | 2010-06-09 17:34:05 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 14:35:33 -0700 |
| commit | 96e077ae347912dfce0e93f5958efc3ed6f311f4 (patch) | |
| tree | 58eef1baba1052090daa8c457936c1a1ff66b470 | |
| parent | b34d8915c413acb51d837a45fb8747b61f65c020 (diff) | |
| download | op-kernel-dev-96e077ae347912dfce0e93f5958efc3ed6f311f4.zip op-kernel-dev-96e077ae347912dfce0e93f5958efc3ed6f311f4.tar.gz | |
USB: fix failure path in usb_add_hcd()
This patch (as1389) fixes some errors in the failure pathway of
usb_add_hcd(). The actions it takes ought to be exactly the same as
those taken by usb_remove_hcd(), but they aren't.
In one case (removal of the usb_bus_attr_group), the two routines are
brought into agreement by changing usb_remove_hcd(). All the other
discrepancies are fixed by changing usb_add_hcd().
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/core/hcd.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index 12742f1..caae462 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -2229,7 +2229,7 @@ int usb_add_hcd(struct usb_hcd *hcd, rhdev->speed = USB_SPEED_SUPER; break; default: - goto err_allocate_root_hub; + goto err_set_rh_speed; } hcd->self.root_hub = rhdev; @@ -2305,16 +2305,29 @@ int usb_add_hcd(struct usb_hcd *hcd, return retval; error_create_attr_group: + if (HC_IS_RUNNING(hcd->state)) + hcd->state = HC_STATE_QUIESCING; + spin_lock_irq(&hcd_root_hub_lock); + hcd->rh_registered = 0; + spin_unlock_irq(&hcd_root_hub_lock); + +#ifdef CONFIG_USB_SUSPEND + cancel_work_sync(&hcd->wakeup_work); +#endif mutex_lock(&usb_bus_list_lock); usb_disconnect(&hcd->self.root_hub); mutex_unlock(&usb_bus_list_lock); err_register_root_hub: hcd->driver->stop(hcd); + hcd->state = HC_STATE_HALT; + hcd->poll_rh = 0; + del_timer_sync(&hcd->rh_timer); err_hcd_driver_start: if (hcd->irq >= 0) free_irq(irqnum, hcd); err_request_irq: err_hcd_driver_setup: +err_set_rh_speed: hcd->self.root_hub = NULL; usb_put_dev(rhdev); err_allocate_root_hub: @@ -2337,6 +2350,8 @@ void usb_remove_hcd(struct usb_hcd *hcd) { dev_info(hcd->self.controller, "remove, state %x\n", hcd->state); + sysfs_remove_group(&hcd->self.root_hub->dev.kobj, &usb_bus_attr_group); + if (HC_IS_RUNNING (hcd->state)) hcd->state = HC_STATE_QUIESCING; @@ -2349,7 +2364,6 @@ void usb_remove_hcd(struct usb_hcd *hcd) cancel_work_sync(&hcd->wakeup_work); #endif - sysfs_remove_group(&hcd->self.root_hub->dev.kobj, &usb_bus_attr_group); mutex_lock(&usb_bus_list_lock); usb_disconnect(&hcd->self.root_hub); mutex_unlock(&usb_bus_list_lock); |
