drivers/base: Convert dev->sem to mutex

The semaphore is semantically a mutex. Convert it to a real mutex and
fix up a few places where code was relying on semaphore.h to be included
by device.h, as well as the users of the trylock function, as that value
is now reversed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/usb/core/usb.c b/drivers/usb/core/usb.c
index 397b678f1c47..5ae14f6c1e7a 100644
--- a/drivers/usb/core/usb.c
+++ b/drivers/usb/core/usb.c
@@ -573,7 +573,7 @@ int usb_lock_device_for_reset(struct usb_device *udev,
                         iface->condition == USB_INTERFACE_UNBOUND))
                 return -EINTR;
 
-        while (usb_trylock_device(udev) != 0) {
+        while (!usb_trylock_device(udev)) {
 
                 /* If we can't acquire the lock after waiting one second,
                  * we're probably deadlocked */