[B/D/E/OEM-B/OEM-OSP1-B] [PATCH 3/3] r8152: Set macpassthru in reset_resume callback

[Kai-Heng Feng]

BugLink: https://bugs.launchpad.net/bugs/1847063

r8152 may fail to establish network connection after resume from system
suspend.

If the USB port connects to r8152 lost its power during system suspend,
the MAC address was written before is lost. The reason is that The MAC
address doesn't get written again in its reset_resume callback.

So let's set MAC address again in reset_resume callback. Also remove
unnecessary lock as no other locking attempt will happen during
reset_resume.

Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit a54cdeeb04fc719e4c7f19d6e28dba7ea86cee5b)
Signed-off-by: Kai-Heng Feng <kai.heng.feng at canonical.com>
---
 drivers/net/usb/r8152.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 9193f845095f..e6fd644a6110 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -4501,10 +4501,9 @@ static int rtl8152_reset_resume(struct usb_interface *intf)
 	struct r8152 *tp = usb_get_intfdata(intf);
 
 	clear_bit(SELECTIVE_SUSPEND, &tp->flags);
-	mutex_lock(&tp->control);
 	tp->rtl_ops.init(tp);
 	queue_delayed_work(system_long_wq, &tp->hw_phy_work, 0);
-	mutex_unlock(&tp->control);
+	set_ethernet_addr(tp);
 	return rtl8152_resume(intf);
 }
 
-- 
2.17.1