libata: Apply NOLPM quirk to Crucial M500 480 and 960GB SSDs
authorHans de Goede <hdegoede@redhat.com>
Mon, 19 Mar 2018 15:33:58 +0000 (16:33 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 28 Mar 2018 16:24:36 +0000 (18:24 +0200)
commit596d0a8e7c774b6d18990a6ca0f79d3d5763fe8e
treefc40790802c7cbfb90d738e972d61f23c9fa0b9d
parent01b6d6839a2803b068348eaa4e48a00e90785f28
libata: Apply NOLPM quirk to Crucial M500 480 and 960GB SSDs

commit 62ac3f7305470e3f52f159de448bc1a771717e88 upstream.

There have been reports of the Crucial M500 480GB model not working
with LPM set to min_power / med_power_with_dipm level.

It has not been tested with medium_power, but that typically has no
measurable power-savings.

Note the reporters Crucial_CT480M500SSD3 has a firmware version of MU03
and there is a MU05 update available, but that update does not mention any
LPM fixes in its changelog, so the quirk matches all firmware versions.

In my experience the LPM problems with (older) Crucial SSDs seem to be
limited to higher capacity versions of the SSDs (different firmware?),
so this commit adds a NOLPM quirk for the 480 and 960GB versions of the
M500, to avoid LPM causing issues with these SSDs.

Cc: stable@vger.kernel.org
Reported-and-tested-by: Martin Steigerwald <martin@lichtvoll.de>
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