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[PATCH] updates for "controller suspended" handling

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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(-)
This commit is contained in:
David Brownell 2005-09-27 10:38:54 -07:00 committed by Greg Kroah-Hartman
parent 5edbfb7c8a
commit b13296c661
2 changed files with 14 additions and 17 deletions
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28
drivers/usb/core/hcd.c
View File

@ -458,22 +458,18 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)
default:
/* non-generic request */
if (HC_IS_SUSPENDED (hcd->state))
status = -EAGAIN;
else {
switch (typeReq) {
case GetHubStatus:
case GetPortStatus:
len = 4;
break;
case GetHubDescriptor:
len = sizeof (struct usb_hub_descriptor);
break;
}
status = hcd->driver->hub_control (hcd,
typeReq, wValue, wIndex,
tbuf, wLength);
switch (typeReq) {
case GetHubStatus:
case GetPortStatus:
len = 4;
break;
case GetHubDescriptor:
len = sizeof (struct usb_hub_descriptor);
break;
}
status = hcd->driver->hub_control (hcd,
typeReq, wValue, wIndex,
tbuf, wLength);
break;
error:
/* "protocol stall" on error */
@ -487,7 +483,7 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb)
"CTRL: TypeReq=0x%x val=0x%x "
"idx=0x%x len=%d ==> %d\n",
typeReq, wValue, wIndex,
wLength, urb->status);
wLength, status);
}
}
if (len) {

3
drivers/usb/core/urb.c
View File

@ -237,7 +237,8 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
(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;