From: Tom Yan <tom.ty89@xxxxxxxxx> Nothing in the kernel actually makes use of the DRA bit in SCSI MODE SENSE. Neither is there a sysfs file (like 'cache_type' for WCE) that allows users to change the bit nor SCSI-ATA Translation that can toggle the ATA feature. Hence removing the MODE SENSE SCSI-ATA Translation that is only triggered by the change of WCE to avoid silliness like this: https://bugzilla.kernel.org/show_bug.cgi?id=105861#c2 Signed-off-by: Tom Yan <tom.ty89@xxxxxxxxx> diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 0295c38..8c07db8 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2316,8 +2316,6 @@ 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 */ return sizeof(def_cache_mpage); } -- 2.8.2 -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
