linux-kernel - Re: block: remove dead code in scsi_ioctl:blk_verify

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Date:	Thu, 29 May 2014 13:39:40 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org
Subject: Re: block: remove dead code in scsi_ioctl:blk_verify_command

On 05/29/2014 01:11 PM, Dave Jones wrote:
> filter gets assigned the address of blk_default_cmd_filter on
> entry to this function, so the !filter condition can never be true.
> 
> Signed-off-by: Dave Jones <davej@...hat.com>
> 
> diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
> index 26487972ac54..9c28a5b38042 100644
> --- a/block/scsi_ioctl.c
> +++ b/block/scsi_ioctl.c
> @@ -205,10 +205,6 @@ int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm)
>  	if (capable(CAP_SYS_RAWIO))
>  		return 0;
>  
> -	/* if there's no filter set, assume we're filtering everything out */
> -	if (!filter)
> -		return -EPERM;
> -
>  	/* Anybody who can open the device can do a read-safe command */
>  	if (test_bit(cmd[0], filter->read_ok))
>  		return 0;

Thanks Dave, applied.

-- 
Jens Axboe

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