linux-kernel - Re: [PATCH] scsi_sysfs: Fix queue_ramp_up

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Message-ID: <562F2070.70200@suse.de>
Date:	Tue, 27 Oct 2015 07:57:52 +0100
From:	Hannes Reinecke <hare@...e.de>
To:	Peter Oberparleiter <oberpar@...ux.vnet.ibm.com>,
	"James E.J. Bottomley" <JBottomley@...n.com>
Cc:	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scsi_sysfs: Fix queue_ramp_up_period return code

On 10/26/2015 03:54 PM, Peter Oberparleiter wrote:
> Writing a number to /sys/bus/scsi/devices/<sdev>/queue_ramp_up_period
> returns the value of that number instead of the number of bytes written.
> This behavior can confuse programs expecting POSIX write() semantics.
> Fix this by returning the number of bytes written instead.
> 
> Signed-off-by: Peter Oberparleiter <oberpar@...ux.vnet.ibm.com>
> ---
>  drivers/scsi/scsi_sysfs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
> index b333389..6b0f292 100644
> --- a/drivers/scsi/scsi_sysfs.c
> +++ b/drivers/scsi/scsi_sysfs.c
> @@ -898,7 +898,7 @@ sdev_store_queue_ramp_up_period(struct device *dev,
>  		return -EINVAL;
> 
>  	sdev->queue_ramp_up_period = msecs_to_jiffies(period);
> -	return period;
> +	return count;
>  }
> 
>  static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR,
> 
Reviewed-by: Hannes Reinecke <hare@...e.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		      zSeries & Storage
hare@...e.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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