linux-kernel - Re: [PATCH 5/5] s390:block:fix up ENOIOCTLCMD error handling

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Date:	Mon, 27 Aug 2012 12:25:32 +0200
From:	Stefan Weinhuber <WEIN@...ibm.com>
To:	heicars2@...ux.vnet.ibm.com
Cc:	BOEBLINGEN LINUX390 <LINUX390@...ibm.com>,
	Wanlong Gao <gaowanlong@...fujitsu.com>,
	linux-kernel@...r.kernel.org,
	"open list:S390" <linux-s390@...r.kernel.org>,
	mschwid2@...ux.vnet.ibm.com
Subject: Re: [PATCH 5/5] s390:block:fix up ENOIOCTLCMD error handling

heicars2@...ux.vnet.ibm.com wrote on 2012-08-27 11:03:55:

[..]
> 
> Thanks, but you missed the else path. I'm going to commit the patch 
below
> unless Stefan has any objections:
> 
> From dac16bd8b314dc6f3f4e6815feab199fdfc8cddd Mon Sep 17 00:00:00 2001
> From: Heiko Carstens <heiko.carstens@...ibm.com>
> Date: Mon, 27 Aug 2012 10:59:42 +0200
> Subject: [PATCH] s390/dasd: fix ioctl return value
> 
> For unimplemented ioctls the dasd driver should return -ENOTTY.
> 
> Reported-by: Wanlong Gao <gaowanlong@...fujitsu.com>
> Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
> ---
>  drivers/s390/block/dasd_eckd.c  | 2 +-
>  drivers/s390/block/dasd_ioctl.c | 7 ++-----
>  2 files changed, 3 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/s390/block/dasd_eckd.c 
b/drivers/s390/block/dasd_eckd.c
> index 40a826a..2fb2b9e 100644
> --- a/drivers/s390/block/dasd_eckd.c
> +++ b/drivers/s390/block/dasd_eckd.c
> @@ -3804,7 +3804,7 @@ dasd_eckd_ioctl(struct dasd_block *block, 
> unsigned int cmd, void __user *argp)
>     case BIODASDSYMMIO:
>        return dasd_symm_io(device, argp);
>     default:
> -      return -ENOIOCTLCMD;
> +      return -ENOTTY;
>     }
>  }
> 
> diff --git a/drivers/s390/block/dasd_ioctl.c 
b/drivers/s390/block/dasd_ioctl.c
> index cceae70..654c692 100644
> --- a/drivers/s390/block/dasd_ioctl.c
> +++ b/drivers/s390/block/dasd_ioctl.c
> @@ -498,12 +498,9 @@ int dasd_ioctl(struct block_device *bdev, fmode_t 
mode,
>        break;
>     default:
>        /* if the discipline has an ioctl method try it. */
> -      if (base->discipline->ioctl) {
> +      rc = -ENOTTY;
> +      if (base->discipline->ioctl)
>           rc = base->discipline->ioctl(block, cmd, argp);
> -         if (rc == -ENOIOCTLCMD)
> -            rc = -EINVAL;
> -      } else
> -         rc = -EINVAL;
>     }
>     dasd_put_device(base);
>     return rc;
> -- 
> 1.7.11.5
> 

The patch is looking fine to me, thanks.

Mit freundlichen Grüßen / Kind regards
 
Stefan Weinhuber



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