[PATCH 5.0 120/137] aqc111: fix endianness issue in aqc111_change_mtu

[Greg Kroah-Hartman]

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

[ Upstream commit b8b277525e9df2fd2dc3d1f4fe01c6796bb107fc ]

If the MTU is large enough, the first write to the device
is just repeated. On BE architectures, however, the first
word of the command will be swapped a second time and garbage
will be written. Avoid that.

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 |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/usb/aqc111.c
+++ b/drivers/net/usb/aqc111.c
@@ -453,6 +453,8 @@ static int aqc111_change_mtu(struct net_
                reg16 = 0x1420;
        else if (dev->net->mtu <= 16334)
                reg16 = 0x1A20;
+       else
+               return 0;
 
        aqc111_write16_cmd(dev, AQ_ACCESS_MAC, SFR_PAUSE_WATERLVL_LOW,
                           2, &reg16);