From: Tom Yan <tom.ty89@xxxxxxxxx>
`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 <tom.ty89@xxxxxxxxx>
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index bf4cb21..b00521b 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 */
+ }
return sizeof(def_cache_mpage);
}
@@ -2446,8 +2448,13 @@ 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);
}
--
2.9.0
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