netdev - Re: [PATCH][next] net: aquantia: fix unsigned numvecs comparison with less than zero

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Message-Id: <20180510.175358.1296757435086922873.davem@davemloft.net>
Date:   Thu, 10 May 2018 17:53:58 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     colin.king@...onical.com
Cc:     igor.russkikh@...antia.com, pavel.belous@...antia.com,
        weiyongjun1@...wei.com, netdev@...r.kernel.org,
        kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH][next] net: aquantia: fix unsigned numvecs comparison
 with less than zero

From: Colin King <colin.king@...onical.com>
Date: Thu, 10 May 2018 13:52:01 +0100

> From: Colin Ian King <colin.king@...onical.com>
> 
> The comparison of numvecs < 0 is always false because numvecs is a u32
> and hence the error return from a failed call to pci_alloc_irq_vectores
> is never detected.  Fix this by using the signed int ret to handle the
> error return and assign numvecs to err.
> 
> Detected by CoverityScan, CID#1468650 ("Unsigned compared against 0")
> 
> Fixes: a09bd81b5413 ("net: aquantia: Limit number of vectors to actually allocated irqs")
> Signed-off-by: Colin Ian King <colin.king@...onical.com>

This doesn't apply to net-next.