Commit 4681b171 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki

USB / Hub: Do not call device_set_wakeup_capable() under spinlock

A subsequent patch will modify device_set_wakeup_capable() in such
a way that it will call functions which may sleep and therefore it
shouldn't be called under spinlocks.  In preparation to that, modify
usb_set_device_state() to avoid calling device_set_wakeup_capable()
under device_state_lock.
Tested-by: default avatarMinchan Kim <minchan.kim@gmail.com>
Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Acked-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 0295a34d
......@@ -1465,6 +1465,7 @@ void usb_set_device_state(struct usb_device *udev,
enum usb_device_state new_state)
{
unsigned long flags;
int wakeup = -1;
spin_lock_irqsave(&device_state_lock, flags);
if (udev->state == USB_STATE_NOTATTACHED)
......@@ -1479,11 +1480,10 @@ void usb_set_device_state(struct usb_device *udev,
|| new_state == USB_STATE_SUSPENDED)
; /* No change to wakeup settings */
else if (new_state == USB_STATE_CONFIGURED)
device_set_wakeup_capable(&udev->dev,
(udev->actconfig->desc.bmAttributes
& USB_CONFIG_ATT_WAKEUP));
wakeup = udev->actconfig->desc.bmAttributes
& USB_CONFIG_ATT_WAKEUP;
else
device_set_wakeup_capable(&udev->dev, 0);
wakeup = 0;
}
if (udev->state == USB_STATE_SUSPENDED &&
new_state != USB_STATE_SUSPENDED)
......@@ -1495,6 +1495,8 @@ void usb_set_device_state(struct usb_device *udev,
} else
recursively_mark_NOTATTACHED(udev);
spin_unlock_irqrestore(&device_state_lock, flags);
if (wakeup >= 0)
device_set_wakeup_capable(&udev->dev, wakeup);
}
EXPORT_SYMBOL_GPL(usb_set_device_state);
......
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