From: Simon Horman <horms@kernel.org>
To: Yue Haibing <yuehaibing@huawei.com>
Cc: anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, ast@kernel.org, daniel@iogearbox.net,
hawk@kernel.org, john.fastabend@gmail.com,
vedang.patel@intel.com, andre.guedes@intel.com,
maciej.fijalkowski@intel.com, jithu.joseph@intel.com,
intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [PATCH net] igc: Fix passing 0 to ERR_PTR in igc_xdp_run_prog()
Date: Wed, 16 Oct 2024 19:53:33 +0100 [thread overview]
Message-ID: <20241016185333.GL2162@kernel.org> (raw)
In-Reply-To: <20241016105310.3500279-1-yuehaibing@huawei.com>
On Wed, Oct 16, 2024 at 06:53:10PM +0800, Yue Haibing wrote:
> Return NULL instead of passing to ERR_PTR while res is IGC_XDP_PASS,
> which is zero, this fix smatch warnings:
> drivers/net/ethernet/intel/igc/igc_main.c:2533
> igc_xdp_run_prog() warn: passing zero to 'ERR_PTR'
>
> Fixes: 26575105d6ed ("igc: Add initial XDP support")
> Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
> ---
> drivers/net/ethernet/intel/igc/igc_main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
> index 6e70bca15db1..c3d6e20c0be0 100644
> --- a/drivers/net/ethernet/intel/igc/igc_main.c
> +++ b/drivers/net/ethernet/intel/igc/igc_main.c
> @@ -2530,7 +2530,7 @@ static struct sk_buff *igc_xdp_run_prog(struct igc_adapter *adapter,
> res = __igc_xdp_run_prog(adapter, prog, xdp);
>
> out:
> - return ERR_PTR(-res);
> + return res ? ERR_PTR(-res) : NULL;
I think this is what PTR_ERR_OR_ZERO() is for.
WARNING: multiple messages have this Message-ID (diff)
From: Simon Horman <horms@kernel.org>
To: Yue Haibing <yuehaibing@huawei.com>
Cc: anthony.l.nguyen@intel.com, przemyslaw.kitszel@intel.com,
davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
pabeni@redhat.com, ast@kernel.org, daniel@iogearbox.net,
hawk@kernel.org, john.fastabend@gmail.com,
vedang.patel@intel.com, andre.guedes@intel.com,
maciej.fijalkowski@intel.com, jithu.joseph@intel.com,
intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, bpf@vger.kernel.org
Subject: Re: [Intel-wired-lan] [PATCH net] igc: Fix passing 0 to ERR_PTR in igc_xdp_run_prog()
Date: Wed, 16 Oct 2024 19:53:33 +0100 [thread overview]
Message-ID: <20241016185333.GL2162@kernel.org> (raw)
In-Reply-To: <20241016105310.3500279-1-yuehaibing@huawei.com>
On Wed, Oct 16, 2024 at 06:53:10PM +0800, Yue Haibing wrote:
> Return NULL instead of passing to ERR_PTR while res is IGC_XDP_PASS,
> which is zero, this fix smatch warnings:
> drivers/net/ethernet/intel/igc/igc_main.c:2533
> igc_xdp_run_prog() warn: passing zero to 'ERR_PTR'
>
> Fixes: 26575105d6ed ("igc: Add initial XDP support")
> Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
> ---
> drivers/net/ethernet/intel/igc/igc_main.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/igc/igc_main.c b/drivers/net/ethernet/intel/igc/igc_main.c
> index 6e70bca15db1..c3d6e20c0be0 100644
> --- a/drivers/net/ethernet/intel/igc/igc_main.c
> +++ b/drivers/net/ethernet/intel/igc/igc_main.c
> @@ -2530,7 +2530,7 @@ static struct sk_buff *igc_xdp_run_prog(struct igc_adapter *adapter,
> res = __igc_xdp_run_prog(adapter, prog, xdp);
>
> out:
> - return ERR_PTR(-res);
> + return res ? ERR_PTR(-res) : NULL;
I think this is what PTR_ERR_OR_ZERO() is for.
next prev parent reply other threads:[~2024-10-16 18:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-16 10:53 [PATCH net] igc: Fix passing 0 to ERR_PTR in igc_xdp_run_prog() Yue Haibing
2024-10-16 10:53 ` [Intel-wired-lan] " Yue Haibing
2024-10-16 18:53 ` Simon Horman [this message]
2024-10-16 18:53 ` Simon Horman
2024-10-16 23:06 ` Jacob Keller
2024-10-16 23:12 ` Jacob Keller
2024-10-17 3:51 ` Yue Haibing
2024-10-17 3:55 ` Yue Haibing
2024-10-17 11:03 ` Maciej Fijalkowski
2024-10-17 16:26 ` Jacob Keller
2024-10-18 6:37 ` Kurt Kanzenbach
2024-10-17 14:16 ` Simon Horman
2024-10-17 16:25 ` Jacob Keller
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