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Message-ID: <20210609092757.GF1955@kadam>
Date: Wed, 9 Jun 2021 12:27:57 +0300
From: Dan Carpenter <dan.carpenter@...cle.com>
To: Colin King <colin.king@...onical.com>
Cc: "David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Oleksij Rempel <linux@...pel-privat.de>,
linux-usb@...r.kernel.org, netdev@...r.kernel.org,
kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2][next] net: usb: asix: Fix less than zero comparison
of a u16
On Tue, Jun 08, 2021 at 04:22:48PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
>
> The comparison of the u16 priv->phy_addr < 0 is always false because
> phy_addr is unsigned. Fix this by assigning the return from the call
> to function asix_read_phy_addr to int ret and using this for the
> less than zero error check comparison.
>
> Addresses-Coverity: ("Unsigned compared against 0")
> Fixes: e532a096be0e ("net: usb: asix: ax88772: add phylib support")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
> ---
> drivers/net/usb/asix_devices.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/usb/asix_devices.c b/drivers/net/usb/asix_devices.c
> index 57dafb3262d9..211c5a87eb15 100644
> --- a/drivers/net/usb/asix_devices.c
> +++ b/drivers/net/usb/asix_devices.c
> @@ -704,9 +704,10 @@ static int ax88772_init_phy(struct usbnet *dev)
> struct asix_common_private *priv = dev->driver_priv;
> int ret;
>
> - priv->phy_addr = asix_read_phy_addr(dev, true);
> - if (priv->phy_addr < 0)
> + ret = asix_read_phy_addr(dev, true);
> + if (ret < 0)
> return priv->phy_addr;
return ret;
regards,
dan carpenter
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