summaryrefslogtreecommitdiffstats
path: root/drivers/usb/host/hwa-hc.c
diff options
context:
space:
mode:
authorThomas Pugliese <thomas.pugliese@gmail.com>2013-10-01 14:04:33 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-10-03 15:46:26 -0700
commit7e176dcb035eef8917e5fc2e653460b5410dbc34 (patch)
treec3883880d23e756d1892b6f76606e8005c3d13a4 /drivers/usb/host/hwa-hc.c
parent33186c441684de348636f94412d2fc256e641113 (diff)
downloadop-kernel-dev-7e176dcb035eef8917e5fc2e653460b5410dbc34.zip
op-kernel-dev-7e176dcb035eef8917e5fc2e653460b5410dbc34.tar.gz
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>
Diffstat (limited to 'drivers/usb/host/hwa-hc.c')
-rw-r--r--drivers/usb/host/hwa-hc.c10
1 files 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,
OpenPOWER on IntegriCloud