linux-kernel - Re: [PATCH][next] mt76: fix less than zero check on a u8 variable

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Message-ID: <a0d21c98-9421-547f-6dd9-5153812107e5@nbd.name>
Date:   Sat, 11 May 2019 15:31:34 +0200
From:   Felix Fietkau <nbd@....name>
To:     Colin King <colin.king@...onical.com>, Roy Luo <royluo@...gle.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S . Miller" <davem@...emloft.net>,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] mt76: fix less than zero check on a u8 variable

On 2019-05-05 23:31, Colin King wrote:
> From: Colin Ian King <colin.king@...onical.com>
> 
> The signed return from the call to get_omac_idx is being assigned to the
> u8 variable mac_idx and then checked for a negative error condition
> which is always going to be false. Fix this by assigning the return to
> the int variable ret and checking this instead.
> 
> Addresses-Coverity: ("Unsigned compared against 0")
> Fixes: 04b8e65922f6 ("mt76: add mac80211 driver for MT7615 PCIe-based chipsets")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>
Already fixed by a similar patch by Dan Carpenter.

- Felix