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
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