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 <[email protected]> --- drivers/usb/host/hwa-hc.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/hwa-hc.c b/drivers/usb/host/hwa-hc.c index 5b86ffb..e58b924 100644 --- a/drivers/usb/host/hwa-hc.c +++ b/drivers/usb/host/hwa-hc.c @@ -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, -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
