[PATCH 5.0 122/137] aqc111: fix double endianness swap on BE

[Greg Kroah-Hartman]

From: Oliver Neukum <oneu...@suse.com>

[ Upstream commit 2cf672709beb005f6e90cb4edbed6f2218ba953e ]

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 <oneu...@suse.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/net/usb/aqc111.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/net/usb/aqc111.c
+++ b/drivers/net/usb/aqc111.c
@@ -1428,7 +1428,7 @@ static int aqc111_resume(struct usb_inte
 {
        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_inte
        /* 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,