On 08/06/2021 19:11, Oleksij Rempel wrote:
> On Tue, Jun 08, 2021 at 04:22:49PM +0100, Colin King wrote:
>> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>>
>> 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: 7e88b11a862a ("net: usb: asix: refactor asix_read_phy_addr() and handle errors on return")
>
> Here is wrong Fixes tag. This assignment was bogus before this patch.
I'm not sure that's correct, that commit has the following change in it:
diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c
index b404c9462dce..c8ca5187eece 100644
--- a/drivers/net/usb/ax88172a.c
+++ b/drivers/net/usb/ax88172a.c
@@ -220,6 +220,11 @@ static int ax88172a_bind(struct usbnet *dev, struct
usb_interface *intf)
}
priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy);
+ if (priv->phy_addr < 0) {
+ ret = priv->phy_addr;
+ goto free;
+ }
+
>
>> Signed-off-by: Colin Ian King <colin.king@xxxxxxxxxxxxx>
>> ---
>> drivers/net/usb/ax88172a.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/usb/ax88172a.c b/drivers/net/usb/ax88172a.c
>> index 2e2081346740..e24773bb9398 100644
>> --- a/drivers/net/usb/ax88172a.c
>> +++ b/drivers/net/usb/ax88172a.c
>> @@ -205,7 +205,8 @@ static int ax88172a_bind(struct usbnet *dev, struct usb_interface *intf)
>> goto free;
>> }
>>
>> - priv->phy_addr = asix_read_phy_addr(dev, priv->use_embdphy);
>> + ret = asix_read_phy_addr(dev, priv->use_embdphy);
>> + priv->phy_addr = ret;
>
> Ah.. it is same bug in different color :)
> You probably wonted to do:
> if (ret < 0)
> goto free;
>
> priv->phy_addr = ret;
Doh, brain failure of mine. I'll send a V2 later today.
>
>> if (priv->phy_addr < 0) {
>> ret = priv->phy_addr;
>> goto free;
>> --
>> 2.31.1
>>
>>
>
