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usb: wusbcore: implement hwahc_op_get_frame_number 

This patch adds an implementation for hwahc_op_get_frame_number.  The
request is fulfulled by forwarding it to the lower hcd.  This was done
because the GET_TIME request on the HWA requires sending an URB to the
HWA and waiting for the results which cannot be done in atomic context.

Signed-off-by: Thomas Pugliese <thomas.pugliese@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Pugliese 2013-10-01 14:04:33 -05:00 committed by Greg Kroah-Hartman
parent 33186c4416
commit 7e176dcb03
1 changed files with 7 additions and 3 deletions
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10
drivers/usb/host/hwa-hc.c
View File

@ -199,10 +199,14 @@ static int hwahc_op_get_frame_number(struct usb_hcd *usb_hcd)
{
struct wusbhc *wusbhc = usb_hcd_to_wusbhc(usb_hcd);
struct hwahc *hwahc = container_of(wusbhc, struct hwahc, wusbhc);
struct wahc *wa = &hwahc->wa;
dev_err(wusbhc->dev, "%s (%p [%p]) UNIMPLEMENTED\n", __func__,
usb_hcd, hwahc);
return -ENOSYS;
/*
* We cannot query the HWA for the WUSB time since that requires sending
* a synchronous URB and this function can be called in_interrupt.
* Instead, query the USB frame number for our parent and use that.
*/
return usb_get_current_frame_number(wa->usb_dev);
}
static int hwahc_op_urb_enqueue(struct usb_hcd *usb_hcd, struct urb *urb,