From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
This patch (as1324) makes a small change to the code used for remote
wakeup of root hubs. hcd_resume_work() now calls the hub driver's
remote-wakeup routine instead of implementing its own version.
The patch is complicated by the need to rename remote_wakeup() to
usb_remote_wakeup(), make it non-static, and declare it in a header
file. There's also the additional complication required to make
everything work when CONFIG_PM isn't set; the do-nothing inline
routine had to be moved into the header file.
Signed-off-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/usb/core/hcd.c | 3 +--
drivers/usb/core/hub.c | 13 ++++---------
drivers/usb/core/usb.h | 6 ++++++
3 files changed, 11 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index cf0a098..fc4290b 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1865,8 +1865,7 @@ static void hcd_resume_work(struct work_struct *work)
struct usb_device *udev = hcd->self.root_hub;
usb_lock_device(udev);
- usb_mark_last_busy(udev);
- usb_external_resume_device(udev, PMSG_REMOTE_RESUME);
+ usb_remote_wakeup(udev);
usb_unlock_device(udev);
}
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 4986ff6..bfa6123 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -2399,7 +2399,7 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg)
}
/* caller has locked udev */
-static int remote_wakeup(struct usb_device *udev)
+int usb_remote_wakeup(struct usb_device *udev)
{
int status = 0;
@@ -2443,7 +2443,7 @@ int usb_port_resume(struct usb_device *udev, pm_message_t msg)
return status;
}
-static inline int remote_wakeup(struct usb_device *udev)
+int usb_remote_wakeup(struct usb_device *udev)
{
return 0;
}
@@ -2514,11 +2514,6 @@ EXPORT_SYMBOL_GPL(usb_root_hub_lost_power);
#else /* CONFIG_PM */
-static inline int remote_wakeup(struct usb_device *udev)
-{
- return 0;
-}
-
#define hub_suspend NULL
#define hub_resume NULL
#define hub_reset_resume NULL
@@ -3017,7 +3012,7 @@ static void hub_port_connect_change(struct usb_hub *hub, int port1,
/* For a suspended device, treat this as a
* remote wakeup event.
*/
- status = remote_wakeup(udev);
+ status = usb_remote_wakeup(udev);
#endif
} else {
@@ -3363,7 +3358,7 @@ static void hub_events(void)
msleep(10);
usb_lock_device(udev);
- ret = remote_wakeup(hdev->
+ ret = usb_remote_wakeup(hdev->
children[i-1]);
usb_unlock_device(udev);
if (ret < 0)
diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h
index 4c36c7f..2b74a7f 100644
--- a/drivers/usb/core/usb.h
+++ b/drivers/usb/core/usb.h
@@ -63,6 +63,7 @@ extern int usb_external_suspend_device(struct usb_device *udev,
pm_message_t msg);
extern int usb_external_resume_device(struct usb_device *udev,
pm_message_t msg);
+extern int usb_remote_wakeup(struct usb_device *dev);
static inline void usb_pm_lock(struct usb_device *udev)
{
@@ -86,6 +87,11 @@ static inline int usb_port_resume(struct usb_device *udev, pm_message_t msg)
return 0;
}
+static inline int usb_remote_wakeup(struct usb_device *udev)
+{
+ return 0;
+}
+
static inline void usb_pm_lock(struct usb_device *udev) {}
static inline void usb_pm_unlock(struct usb_device *udev) {}
--
1.7.0.1
--
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