aqc111: fix double endianness swap on BE

If you are using a function that does a swap in place,
you cannot just reuse the buffer on the assumption that it has
not been changed.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/drivers/net/usb/aqc111.c b/drivers/net/usb/aqc111.c
index 599d560a8450..b86c5ce9a92a 100644
--- a/drivers/net/usb/aqc111.c
+++ b/drivers/net/usb/aqc111.c
@@ -1428,7 +1428,7 @@ static int aqc111_resume(struct usb_interface *intf)
 {
         struct usbnet *dev = usb_get_intfdata(intf);
         struct aqc111_data *aqc111_data = dev->driver_priv;
-        u16 reg16;
+        u16 reg16, oldreg16;
         u8 reg8;
 
         netif_carrier_off(dev->net);
@@ -1444,9 +1444,11 @@ static int aqc111_resume(struct usb_interface *intf)
         /* Configure RX control register => start operation */
         reg16 = aqc111_data->rxctl;
         reg16 &= ~SFR_RX_CTL_START;
+        /* needs to be saved in case endianness is swapped */
+        oldreg16 = reg16;
         aqc111_write16_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL, 2, &reg16);
 
-        reg16 |= SFR_RX_CTL_START;
+        reg16 = oldreg16 | SFR_RX_CTL_START;
         aqc111_write16_cmd_nopm(dev, AQ_ACCESS_MAC, SFR_RX_CTL, 2, &reg16);
 
         aqc111_set_phy_speed(dev, aqc111_data->autoneg,