Coverity: ax88772_init_phy(): Control flow issues

[coverity-bot <keescook@chromium.org>]

Hello!

This is an experimental semi-automated report about issues detected by
Coverity from a scan of next-20210608 as part of the linux-next scan project:
https://scan.coverity.com/projects/linux-next-weekly-scan

You're getting this email because you were associated with the identified
lines of code (noted below) that were touched by commits:

  Mon Jun 7 13:23:02 2021 -0700
    e532a096be0e ("net: usb: asix: ax88772: add phylib support")

Coverity reported the following:

*** CID 1505172:  Control flow issues  (NO_EFFECT)
/drivers/net/usb/asix_devices.c: 708 in ax88772_init_phy()
702     static int ax88772_init_phy(struct usbnet *dev)
703     {
704     	struct asix_common_private *priv = dev->driver_priv;
705     	int ret;
706
707     	priv->phy_addr = asix_read_phy_addr(dev, true);
vvv     CID 1505172:  Control flow issues  (NO_EFFECT)
vvv     This less-than-zero comparison of an unsigned value is never true. "priv->phy_addr < 0".
708     	if (priv->phy_addr < 0)
709     		return priv->phy_addr;
710
711     	snprintf(priv->phy_name, sizeof(priv->phy_name), PHY_ID_FMT,
712     		 priv->mdio->id, priv->phy_addr);
713

If this is a false positive, please let us know so we can mark it as
such, or teach the Coverity rules to be smarter. If not, please make
sure fixes get into linux-next. :) For patches fixing this, please
include these lines (but double-check the "Fixes" first):

Reported-by: coverity-bot <keescook+coverity-bot@chromium.org>
Addresses-Coverity-ID: 1505172 ("Control flow issues")
Fixes: e532a096be0e ("net: usb: asix: ax88772: add phylib support")

Thanks for your attention!

-- 
Coverity-bot