This is a note to let you know that I've just added the patch titled

libata: disable LPM for Crucial BX100 SSD 500GB drive

to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: libata-disable-lpm-for-crucial-bx100-ssd-500gb-drive.patch and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From b17e5729a630d8326a48ec34ef02e6b4464a6aef Mon Sep 17 00:00:00 2001

From: Kai-Heng Feng kai.heng.feng@canonical.com Date: Sun, 18 Feb 2018 22:17:09 +0800 Subject: libata: disable LPM for Crucial BX100 SSD 500GB drive

From: Kai-Heng Feng kai.heng.feng@canonical.com

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@canonical.com Signed-off-by: Tejun Heo tj@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/ata/libata-core.c | 3 +++ 1 file changed, 3 insertions(+)

--- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4403,6 +4403,9 @@ 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 both queued TRIM and LPM issues */ { "Crucial_CT512MX100*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | ATA_HORKAGE_ZERO_AFTER_TRIM |

Patches currently in stable-queue which might be from kai.heng.feng@canonical.com are

queue-4.9/libata-disable-lpm-for-crucial-bx100-ssd-500gb-drive.patch queue-4.9/libata-make-crucial-bx100-500gb-lpm-quirk-apply-to-all-firmware-versions.patch