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

libata: Apply NOLPM quirk to Crucial MX100 512GB SSDs

to the 4.4-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-apply-nolpm-quirk-to-crucial-mx100-512gb-ssds.patch and it can be found in the queue-4.4 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 9c7be59fc519af9081c46c48f06f2b8fadf55ad8 Mon Sep 17 00:00:00 2001

From: Hans de Goede hdegoede@redhat.com Date: Fri, 16 Feb 2018 10:48:20 +0100 Subject: libata: Apply NOLPM quirk to Crucial MX100 512GB SSDs

From: Hans de Goede hdegoede@redhat.com

commit 9c7be59fc519af9081c46c48f06f2b8fadf55ad8 upstream.

Various people have reported the Crucial MX100 512GB model not working with LPM set to min_power. I've now received a report that it also does not work with the new med_power_with_dipm level.

It does work with medium_power, but that has no measurable power-savings and given the amount of people being bitten by the other levels not working, this commit just disables LPM altogether.

Note all reporters of this have either the 512GB model (max capacity), or are not specifying their SSD's size. So for now this quirk assumes this is a problem with the 512GB model only.

Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=89261 Buglink: https://github.com/linrunner/TLP/issues/84 Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede hdegoede@redhat.com Signed-off-by: Tejun Heo tj@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/ata/libata-core.c | 5 +++++ 1 file changed, 5 insertions(+)

--- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -4224,6 +4224,11 @@ static const struct ata_blacklist_entry { "PIONEER DVD-RW DVR-212D", NULL, ATA_HORKAGE_NOSETXFER }, { "PIONEER DVD-RW DVR-216D", NULL, ATA_HORKAGE_NOSETXFER },

+ /* 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 | + ATA_HORKAGE_NOLPM, }, + /* devices that don't properly handle queued TRIM commands */ { "Micron_M500_*", NULL, ATA_HORKAGE_NO_NCQ_TRIM | ATA_HORKAGE_ZERO_AFTER_TRIM, },

Patches currently in stable-queue which might be from hdegoede@redhat.com are

queue-4.4/libata-apply-nolpm-quirk-to-crucial-m500-480-and-960gb-ssds.patch queue-4.4/libata-apply-nolpm-quirk-to-crucial-mx100-512gb-ssds.patch queue-4.4/pci-add-function-1-dma-alias-quirk-for-highpoint-rocketraid-644l.patch queue-4.4/libata-modify-quirks-for-mx100-to-limit-ncq_trim-quirk-to-mu01-version.patch queue-4.4/ahci-add-pci-id-for-the-highpoint-rocketraid-644l-card.patch queue-4.4/libata-make-crucial-bx100-500gb-lpm-quirk-apply-to-all-firmware-versions.patch