[PATCHv2] usb: ehci: unlink_empty_async_suspended() only used with CONFIG_PM

[linux@prisktech.co.nz (Tony Prisk)]

Compiling with !CONFIG_PM generates an unused function warning on
unlink_empty_async_suspended().

Enclose the function in a #ifdef CONFIG_PM

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
---
Fixed up the commit message.
 drivers/usb/host/ehci-q.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 23d1369..3638b28 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -1316,6 +1316,7 @@ static void unlink_empty_async(struct ehci_hcd *ehci)
 	}
 }
 
+#ifdef CONFIG_PM
 /* The root hub is suspended; unlink all the async QHs */
 static void unlink_empty_async_suspended(struct ehci_hcd *ehci)
 {
@@ -1328,7 +1329,7 @@ static void unlink_empty_async_suspended(struct ehci_hcd *ehci)
 	}
 	start_iaa_cycle(ehci, false);
 }
-
+#endif
 /* makes sure the async qh will become idle */
 /* caller must own ehci->lock */
 
-- 
1.7.9.5