From: Yuehaibing <yuehaibing@huawei.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: <peppe.cavallaro@st.com>, <alexandre.torgue@st.com>,
<joabreu@synopsys.com>, <davem@davemloft.net>, <kuba@kernel.org>,
<mcoquelin.stm32@gmail.com>, <ajayg@nvidia.com>,
<netdev@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] net: stmmac: Fix signedness bug in stmmac_probe_config_dt()
Date: Tue, 18 Aug 2020 23:15:43 +0800 [thread overview]
Message-ID: <e8c4e539-d230-2add-6840-ebe1097b8130@huawei.com> (raw)
In-Reply-To: <87ft8katwz.fsf@igel.home>
On 2020/8/18 22:51, Andreas Schwab wrote:
> On Aug 18 2020, YueHaibing wrote:
>
>> The "plat->phy_interface" variable is an enum and in this context GCC
>> will treat it as an unsigned int so the error handling is never
>> triggered.
>>
>> Fixes: b9f0b2f634c0 ("net: stmmac: platform: fix probe for ACPI devices")
>> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
>> ---
>> drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
>> index f32317fa75c8..b5b558b02e7d 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
>> @@ -413,7 +413,7 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
>> }
>>
>> plat->phy_interface = device_get_phy_mode(&pdev->dev);
>> - if (plat->phy_interface < 0)
>> + if ((int)plat->phy_interface < 0)
>> return ERR_PTR(plat->phy_interface);
>
> I don't think the conversion to long when passed to ERR_PTR will produce
> a negative value either (if long is wider than unsigned int).
Thanks, will respin.
>
> Andreas.
>
next prev parent reply other threads:[~2020-08-18 15:16 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-18 14:39 [PATCH] net: stmmac: Fix signedness bug in stmmac_probe_config_dt() YueHaibing
2020-08-18 14:51 ` Andreas Schwab
2020-08-18 15:15 ` Yuehaibing [this message]
2020-08-18 15:15 ` [PATCH v2] " YueHaibing
2020-08-18 17:04 ` Andrew Lunn
2020-08-20 2:23 ` Yuehaibing
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