linux-kernel - Re: [PATCH 21/30] sfc: Add missing annotation for efx_ef10_try_update_nic_stats

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Message-ID: <6971228b-4c53-8a1b-da79-2d4d09d74df5@solarflare.com>
Date:   Mon, 17 Feb 2020 18:00:51 +0000
From:   Martin Habets <mhabets@...arflare.com>
To:     Jules Irenge <jbi.octave@...il.com>, <linux-kernel@...r.kernel.org>
CC:     <boqun.feng@...il.com>,
        Solarflare linux maintainers <linux-net-drivers@...arflare.com>,
        Edward Cree <ecree@...arflare.com>,
        "David S. Miller" <davem@...emloft.net>,
        "open list:SFC NETWORK DRIVER" <netdev@...r.kernel.org>
Subject: Re: [PATCH 21/30] sfc: Add missing annotation for
 efx_ef10_try_update_nic_stats_vf()

On 14/02/2020 20:47, Jules Irenge wrote:
> Sparse reports a warning at  efx_ef10_try_update_nic_stats_vf()
> 
> warning: context imbalance in  efx_ef10_try_update_nic_stats_vf()
> 	 - unexpected unlock
> 
> The root cause is the missing annotation at
> efx_ef10_try_update_nic_stats_vf()
> Add the missing __must_hold(&efx->stats_lock) annotattion
> 
> Signed-off-by: Jules Irenge <jbi.octave@...il.com>

Thanks

Acked-by: Martin Habets <mhabets@...arflare.com>

> ---
>  drivers/net/ethernet/sfc/ef10.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
> index 52113b7529d6..b1102c7e814d 100644
> --- a/drivers/net/ethernet/sfc/ef10.c
> +++ b/drivers/net/ethernet/sfc/ef10.c
> @@ -1820,6 +1820,7 @@ static size_t efx_ef10_update_stats_pf(struct efx_nic *efx, u64 *full_stats,
>  }
>  
>  static int efx_ef10_try_update_nic_stats_vf(struct efx_nic *efx)
> +	__must_hold(&efx->stats_lock)
>  {
>  	MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN);
>  	struct efx_ef10_nic_data *nic_data = efx->nic_data;
>