[PATCH 3.2 102/153] libata: disable LPM for Crucial BX100 SSD 500GB drive

[Ben Hutchings]

3.2.102-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>

commit b17e5729a630d8326a48ec34ef02e6b4464a6aef upstream.

After Laptop Mode Tools starts to use min_power for LPM, a user found
out Crucial BX100 SSD can't get mounted.

Crucial BX100 SSD 500GB drive don't work well with min_power. This also
happens to med_power_with_dipm.

So let's disable LPM for Crucial BX100 SSD 500GB drive.

BugLink: https://bugs.launchpad.net/bugs/1726930
Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
 drivers/ata/libata-core.c | 3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4155,6 +4155,9 @@ static const struct ata_blacklist_entry
 	{ "PIONEER DVD-RW  DVR-212D",	NULL,	ATA_HORKAGE_NOSETXFER },
 	{ "PIONEER DVD-RW  DVR-216D",	NULL,	ATA_HORKAGE_NOSETXFER },
 
+	/* Crucial BX100 SSD 500GB has broken LPM support */
+	{ "CT500BX100SSD1",		"MU02",	ATA_HORKAGE_NOLPM },
+
 	/* The 512GB version of the MX100 has LPM issues */
 	{ "Crucial_CT512MX100*",	NULL,	ATA_HORKAGE_NOLPM, },