Re: [PATCH v3 2/2] libata-scsi: better style in ata_msense_caching()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Tue, Jul 12, 2016 at 09:37:03PM +0800, tom.ty89@xxxxxxxxx wrote:
> From: Tom Yan <tom.ty89@xxxxxxxxx>
> 
> Signed-off-by: Tom Yan <tom.ty89@xxxxxxxxx>
> 
> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
> index bfec66f..48ea887 100644
> --- a/drivers/ata/libata-scsi.c
> +++ b/drivers/ata/libata-scsi.c
> @@ -2424,10 +2424,12 @@ static void modecpy(u8 *dest, const u8 *src, int n, bool changeable)
>  static unsigned int ata_msense_caching(u16 *id, u8 *buf, bool changeable)
>  {
>  	modecpy(buf, def_cache_mpage, sizeof(def_cache_mpage), changeable);
> -	if (changeable || ata_id_wcache_enabled(id))
> -		buf[2] |= (1 << 2);	/* write cache enable */
> -	if (!changeable && !ata_id_rahead_enabled(id))
> -		buf[12] |= (1 << 5);	/* disable read ahead */
> +	if (changeable) {
> +		buf[2] |= 1 << 2; /* ata_mselect_caching() */
> +	} else {
> +		buf[2] |= ata_id_wcache_enabled(id) << 2;	/* write cache enable */
> +		buf[12] |= !ata_id_rahead_enabled(id) << 5;	/* disable read ahead */
> +	}

It's different but I'm not sure this is better.

Thanks.

-- 
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [SCSI Target Devel]     [Linux SCSI Target Infrastructure]     [Kernel Newbies]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Linux IIO]     [Samba]     [Device Mapper]
  Powered by Linux