From: Eric Dumazet <eduma...@google.com>

If an attempt is made to disable RX checksums, USB adapter is changed
but netdev->features is not, because smsc75xx_set_features() returns a
non zero value.

This throws errors from netdev_rx_csum_fault() :
<devname>: hw csum failure

Signed-off-by: Eric Dumazet <eduma...@google.com>
Cc: Steve Glendinning <steve.glendinn...@shawell.net>
---
 drivers/net/usb/smsc75xx.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
index 
d0a113743195acae86931c51eea50b94ddadd487..7a6a1fe793090b8e28f5ef075f5ebc2ad385b5eb
 100644
--- a/drivers/net/usb/smsc75xx.c
+++ b/drivers/net/usb/smsc75xx.c
@@ -954,10 +954,11 @@ static int smsc75xx_set_features(struct net_device 
*netdev,
        /* it's racing here! */
 
        ret = smsc75xx_write_reg(dev, RFE_CTL, pdata->rfe_ctl);
-       if (ret < 0)
+       if (ret < 0) {
                netdev_warn(dev->net, "Error writing RFE_CTL\n");
-
-       return ret;
+               return ret;
+       }
+       return 0;
 }
 
 static int smsc75xx_wait_ready(struct usbnet *dev, int in_pm)

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