[PATCH] updates for "controller suspended" handling
Reject URBs to _all_ devices when their host controllers are suspended;
even root hub registers will be unavailable. Also, don't reject urbs
to root hubs in other cases; the only upstream link is through that
controller (on PCI or whatever SOC bus is in use).
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/core/hcd.c | 28 ++++++++++++----------------
drivers/usb/core/urb.c | 3 ++-
2 files changed, 14 insertions(+), 17 deletions(-)
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index b32898e..f2a1fed 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -237,7 +237,8 @@
(dev->state < USB_STATE_DEFAULT) ||
(!dev->bus) || (dev->devnum <= 0))
return -ENODEV;
- if (dev->state == USB_STATE_SUSPENDED)
+ if (dev->bus->controller->power.power_state.event != PM_EVENT_ON
+ || dev->state == USB_STATE_SUSPENDED)
return -EHOSTUNREACH;
if (!(op = dev->bus->op) || !op->submit_urb)
return -ENODEV;