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authorAlan Stern <stern@rowland.harvard.edu>2010-06-10 01:34:05 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-11 01:35:33 +0400
commit96e077ae347912dfce0e93f5958efc3ed6f311f4 (patch)
tree58eef1baba1052090daa8c457936c1a1ff66b470 /drivers/usb/core
parentb34d8915c413acb51d837a45fb8747b61f65c020 (diff)
downloadlinux-96e077ae347912dfce0e93f5958efc3ed6f311f4.tar.xz
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>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/hcd.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index 12742f152f43..caae4625a1f1 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);