From 737bee9308c457090711684b976e0fe02785a094 Mon Sep 17 00:00:00 2001 From: Tom Yan Date: Wed, 20 Jul 2016 04:39:28 +0800 Subject: libata-scsi: better style in ata_msense_*() `changeable` is the "version" of mode page requested by the user. It will be less confusing/misleading if we do not check it "together" with the setting bits of the drive. Not to mention that we currently have ata_mselect_*() implemented in a way that each of them will serve exclusively a particular bit on each page. The old style will hence make the condition look even more unnecessarily arcane if the ata_msense_*() is reflecting more than one bit. Signed-off-by: Tom Yan Signed-off-by: Tejun Heo --- drivers/ata/libata-scsi.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) (limited to 'drivers/ata/libata-scsi.c') diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 7d0e60b471cf..2bdb5dab922b 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -2429,10 +2429,12 @@ 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 */ + } return sizeof(def_cache_mpage); } @@ -2451,8 +2453,13 @@ static unsigned int ata_msense_control(struct ata_device *dev, u8 *buf, bool changeable) { modecpy(buf, def_control_mpage, sizeof(def_control_mpage), changeable); - if (changeable || (dev->flags & ATA_DFLAG_D_SENSE)) - buf[2] |= (1 << 2); /* Descriptor sense requested */ + if (changeable) { + buf[2] |= (1 << 2); /* ata_mselect_control() */ + } else { + bool d_sense = (dev->flags & ATA_DFLAG_D_SENSE); + + buf[2] |= (d_sense << 2); /* descriptor format sense data */ + } return sizeof(def_control_mpage); } -- cgit v1.2.3