Commit b13296c6 authored by David Brownell's avatar David Brownell Committed by Greg Kroah-Hartman
Browse files

[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: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>

 drivers/usb/core/hcd.c |   28 ++++++++++++----------------
 drivers/usb/core/urb.c |    3 ++-
 2 files changed, 14 insertions(+), 17 deletions(-)
parent 5edbfb7c

drivers/usb/core/hcd.c

+12 −16
Original line number Diff line number Diff line
@@ -458,9 +458,6 @@ 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:
@@ -473,7 +470,6 @@ static int rh_call_control (struct usb_hcd *hcd, struct urb *urb) 
		status = hcd->driver->hub_control (hcd,

			typeReq, wValue, wIndex,

			tbuf, wLength);

		}

		break;

error:

		/* "protocol stall" on error */
@@ -487,7 +483,7 @@ error: 
				"CTRL: TypeReq=0x%x val=0x%x "

				"idx=0x%x len=%d ==> %d\n",

				typeReq, wValue, wIndex,

				wLength, urb->status);

				wLength, status);

		}

	}

	if (len) {

drivers/usb/core/urb.c

+2 −1
Original line number Diff line number Diff line
@@ -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;

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