usb2.0 and usb3.0 devices have different ways to enalbe/disable
remote wakeup. This patch is to put both their operations into
the seperate functions. Otherwise, usb_control_msg() has some
long arguments and are usually nested some indentations. So
encapsulating it into seperate functions would be convienient
to use and more readable.
Signed-off-by: Lan Tianyu <tianyu.lan@xxxxxxxxx>
---
drivers/usb/core/hub.c | 136 ++++++++++++++++++++++++------------------------
1 file changed, 68 insertions(+), 68 deletions(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 5480352..56eea28 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2822,22 +2822,72 @@ void usb_enable_ltm(struct usb_device *udev)
EXPORT_SYMBOL_GPL(usb_enable_ltm);
#ifdef CONFIG_USB_SUSPEND
-/*
- * usb_disable_function_remotewakeup - disable usb3.0
- * device's function remote wakeup
- * @udev: target device
- *
- * Assume there's only one function on the USB 3.0
- * device and disable remote wake for the first
- * interface. FIXME if the interface association
- * descriptor shows there's more than one function.
- */
-static int usb_disable_function_remotewakeup(struct usb_device *udev)
+static int usb_disable_remote_wakeup(struct usb_device *udev)
{
- return usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
- USB_REQ_CLEAR_FEATURE, USB_RECIP_INTERFACE,
- USB_INTRF_FUNC_SUSPEND, 0, NULL, 0,
+ int status = 0;
+ u16 devstatus;
+
+ if (udev->speed != USB_SPEED_SUPER) {
+ status = usb_get_status(udev, USB_RECIP_DEVICE, 0, &devstatus);
+ le16_to_cpus(&devstatus);
+ if (!status && devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP))
+ status = usb_control_msg(udev,
+ usb_sndctrlpipe(udev, 0),
+ USB_REQ_CLEAR_FEATURE,
+ USB_RECIP_DEVICE,
+ USB_DEVICE_REMOTE_WAKEUP, 0,
+ NULL, 0,
+ USB_CTRL_SET_TIMEOUT);
+ } else {
+ /*
+ * Assume there's only one function on the USB 3.0
+ * device and disable remote wake for the first
+ * interface. FIXME if the interface association
+ * descriptor shows there's more than one function.
+ */
+ status = usb_get_status(udev, USB_RECIP_INTERFACE, 0,
+ &devstatus);
+ le16_to_cpus(&devstatus);
+ if (!status && devstatus &
+ (USB_INTRF_STAT_FUNC_RW_CAP | USB_INTRF_STAT_FUNC_RW))
+ status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ USB_REQ_CLEAR_FEATURE,
+ USB_RECIP_INTERFACE,
+ USB_INTRF_FUNC_SUSPEND, 0,
+ NULL, 0,
+ USB_CTRL_SET_TIMEOUT);
+ }
+
+ return status;
+}
+
+static int usb_enable_remote_wakeup(struct usb_device *udev)
+{
+ int status;
+
+ if (udev->speed != USB_SPEED_SUPER) {
+ status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ USB_REQ_SET_FEATURE, USB_RECIP_DEVICE,
+ USB_DEVICE_REMOTE_WAKEUP, 0,
+ NULL, 0,
+ USB_CTRL_SET_TIMEOUT);
+ } else {
+ /* Assume there's only one function on the USB 3.0
+ * device and enable remote wake for the first
+ * interface. FIXME if the interface association
+ * descriptor shows there's more than one function.
+ */
+ status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
+ USB_REQ_SET_FEATURE,
+ USB_RECIP_INTERFACE,
+ USB_INTRF_FUNC_SUSPEND,
+ USB_INTRF_FUNC_SUSPEND_RW |
+ USB_INTRF_FUNC_SUSPEND_LP,
+ NULL, 0,
USB_CTRL_SET_TIMEOUT);
+ }
+
+ return status;
}
/*
@@ -2901,27 +2951,7 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
* we don't explicitly enable it here.
*/
if (udev->do_remote_wakeup) {
- if (!hub_is_superspeed(hub->hdev)) {
- status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
- USB_REQ_SET_FEATURE, USB_RECIP_DEVICE,
- USB_DEVICE_REMOTE_WAKEUP, 0,
- NULL, 0,
- USB_CTRL_SET_TIMEOUT);
- } else {
- /* Assume there's only one function on the USB 3.0
- * device and enable remote wake for the first
- * interface. FIXME if the interface association
- * descriptor shows there's more than one function.
- */
- status = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
- USB_REQ_SET_FEATURE,
- USB_RECIP_INTERFACE,
- USB_INTRF_FUNC_SUSPEND,
- USB_INTRF_FUNC_SUSPEND_RW |
- USB_INTRF_FUNC_SUSPEND_LP,
- NULL, 0,
- USB_CTRL_SET_TIMEOUT);
- }
+ status = usb_enable_remote_wakeup(udev);
if (status) {
dev_dbg(&udev->dev, "won't remote wakeup, status %d\n",
status);
@@ -2956,19 +2986,8 @@ int usb_port_suspend(struct usb_device *udev, pm_message_t msg)
dev_dbg(hub->intfdev, "can't suspend port %d, status %d\n",
port1, status);
/* paranoia: "should not happen" */
- if (udev->do_remote_wakeup) {
- if (!hub_is_superspeed(hub->hdev)) {
- (void) usb_control_msg(udev,
- usb_sndctrlpipe(udev, 0),
- USB_REQ_CLEAR_FEATURE,
- USB_RECIP_DEVICE,
- USB_DEVICE_REMOTE_WAKEUP, 0,
- NULL, 0,
- USB_CTRL_SET_TIMEOUT);
- } else
- (void) usb_disable_function_remotewakeup(udev);
-
- }
+ if (udev->do_remote_wakeup)
+ (void)usb_disable_remote_wakeup(udev);
/* Try to enable USB2 hardware LPM again */
if (udev->usb2_hw_lpm_capable == 1)
@@ -3075,26 +3094,7 @@ static int finish_port_resume(struct usb_device *udev)
* udev->reset_resume
*/
} else if (udev->actconfig && !udev->reset_resume) {
- if (!hub_is_superspeed(udev->parent)) {
- le16_to_cpus(&devstatus);
- if (devstatus & (1 << USB_DEVICE_REMOTE_WAKEUP))
- status = usb_control_msg(udev,
- usb_sndctrlpipe(udev, 0),
- USB_REQ_CLEAR_FEATURE,
- USB_RECIP_DEVICE,
- USB_DEVICE_REMOTE_WAKEUP, 0,
- NULL, 0,
- USB_CTRL_SET_TIMEOUT);
- } else {
- status = usb_get_status(udev, USB_RECIP_INTERFACE, 0,
- &devstatus);
- le16_to_cpus(&devstatus);
- if (!status && devstatus & (USB_INTRF_STAT_FUNC_RW_CAP
- | USB_INTRF_STAT_FUNC_RW))
- status =
- usb_disable_function_remotewakeup(udev);
- }
-
+ status = usb_disable_remote_wakeup(udev);
if (status)
dev_dbg(&udev->dev,
"disable remote wakeup, status %d\n",
--
1.7.9.5
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