[usb netdev] asix: fix regression

51bf2976b55d07f9daae9697a0a3ac9f58abcedc caused a regression in the asix
usbnet driver. usb_control_msg returns the number of bytes read on
success, not 0. Tested with NETGEAR FA120.

Signed-off-by: Russ Dill <Russ.Dill@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/net/usb/asix.c b/drivers/net/usb/asix.c
index 1249f444039e..569028b2baf2 100644
--- a/drivers/net/usb/asix.c
+++ b/drivers/net/usb/asix.c
@@ -202,10 +202,10 @@ static int asix_read_cmd(struct usbnet *dev, u8 cmd, u16 value, u16 index,
                 buf,
                 size,
                 USB_CTRL_GET_TIMEOUT);
-        if (err >= 0 && err < size)
-                err = -EINVAL;
-        if (!err)
+        if (err == size)
                 memcpy(data, buf, size);
+        else if (err >= 0)
+                err = -EINVAL;
         kfree(buf);
 
 out: