usbnet: decrease suspend count if returning -EBUSY for runtime suspend

This patch decreases dev->suspend_count in the -EBUSY failure path
of usbnet_suspend. Without the change, the later runtime suspend
will do nothing except for increasing dev->suspend_count.

Signed-off-by: Ming Lei <ming.lei@canonical.com>
Acked-by: Oliver Neukum <oneukum@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 815493caea7f..1e46f693eb47 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1515,6 +1515,7 @@ int usbnet_suspend (struct usb_interface *intf, pm_message_t message)
                 spin_lock_irq(&dev->txq.lock);
                 /* don't autosuspend while transmitting */
                 if (dev->txq.qlen && PMSG_IS_AUTO(message)) {
+                        dev->suspend_count--;
                         spin_unlock_irq(&dev->txq.lock);
                         return -EBUSY;
                 } else {