netdev - RE: [net-next 11/12] igbvf: convert msleep to mdelay in atomic context

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <063D6719AE5E284EB5DD2968C1650D6DD0054ACD@AcuExch.aculab.com>
Date:   Mon, 14 Aug 2017 10:17:31 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Jeff Kirsher' <jeffrey.t.kirsher@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>
CC:     Greg Edwards <gedwards@....com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "nhorman@...hat.com" <nhorman@...hat.com>,
        "sassmann@...hat.com" <sassmann@...hat.com>,
        "jogreene@...hat.com" <jogreene@...hat.com>
Subject: RE: [net-next 11/12] igbvf: convert msleep to mdelay in atomic
 context

From: Jeff Kirsher
> Sent: 09 August 2017 22:48
> From: Greg Edwards <gedwards@....com>
> 
> This fixes a "scheduling while atomic" splat seen with
> CONFIG_DEBUG_ATOMIC_SLEEP enabled.
> 
> Signed-off-by: Greg Edwards <gedwards@....com>
> Tested-by: Aaron Brown <aaron.f.brown@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> ---
>  drivers/net/ethernet/intel/igbvf/vf.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/intel/igbvf/vf.c b/drivers/net/ethernet/intel/igbvf/vf.c
> index 1d3aa9adcaa8..9577ccf4b26a 100644
> --- a/drivers/net/ethernet/intel/igbvf/vf.c
> +++ b/drivers/net/ethernet/intel/igbvf/vf.c
> @@ -149,7 +149,7 @@ static s32 e1000_reset_hw_vf(struct e1000_hw *hw)
>  		msgbuf[0] = E1000_VF_RESET;
>  		mbx->ops.write_posted(hw, msgbuf, 1);
> 
> -		msleep(10);
> +		mdelay(10);

Spinning for 10ms seems somewhat sub-optimal

	David