linux-kernel - Re: [PATCH] ata: propagate return value of scc_wait_after

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Date:	Sat, 16 Aug 2014 07:37:18 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Arjun Sreedharan <arjun024@...il.com>
Cc:	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ata: propagate return value of scc_wait_after_reset

Hello,

On Sat, Aug 16, 2014 at 03:47:17PM +0530, Arjun Sreedharan wrote:
> scc_bus_softreset not necessarily should return zero.
> Propagate the error code.
> Signed-off-by: Arjun Sreedharan <arjun024@...il.com>
> ---
>  drivers/ata/pata_scc.c | 9 ++++-----
>  1 file changed, 4 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/ata/pata_scc.c b/drivers/ata/pata_scc.c
> index 4e006d7..5618c4518 100644
> --- a/drivers/ata/pata_scc.c
> +++ b/drivers/ata/pata_scc.c
> @@ -585,7 +585,7 @@ static int scc_wait_after_reset(struct ata_link *link, unsigned int devmask,
>   *	Note: Original code is ata_bus_softreset().
>   */
>  
> -static unsigned int scc_bus_softreset(struct ata_port *ap, unsigned int devmask,
> +static int scc_bus_softreset(struct ata_port *ap, unsigned int devmask,
>                                        unsigned long deadline)
>  {
>  	struct ata_ioports *ioaddr = &ap->ioaddr;
> @@ -599,9 +599,7 @@ static unsigned int scc_bus_softreset(struct ata_port *ap, unsigned int devmask,

scc_bus_softreset() should return int too, right?

>  	udelay(20);
>  	out_be32(ioaddr->ctl_addr, ap->ctl);
>  
> -	scc_wait_after_reset(&ap->link, devmask, deadline);
> -
> -	return 0;
> +	return scc_wait_after_reset(&ap->link, devmask, deadline);
>  }
>  
>  /**
> @@ -618,7 +616,8 @@ static int scc_softreset(struct ata_link *link, unsigned int *classes,
>  {
>  	struct ata_port *ap = link->ap;
>  	unsigned int slave_possible = ap->flags & ATA_FLAG_SLAVE_POSS;
> -	unsigned int devmask = 0, err_mask;
> +	unsigned int devmask = 0;
> +	int err_mask;

@rc or @ret would be a better name for it.

Thanks.

-- 
tejun
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