libata: Apply NOLPM quirk to Crucial MX100 512GB SSDs
authorHans de Goede <hdegoede@redhat.com>
Fri, 16 Feb 2018 09:48:20 +0000 (10:48 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 28 Mar 2018 16:39:20 +0000 (18:39 +0200)
commita9f062b850db21be39afb2cf22b8eca42ec1e314
tree00a1c51868eec22657d79ba9c12f9aacc861e3b4
parent8b8524d75697da34116c3fd42103b67f69f3dcc8
libata: Apply NOLPM quirk to Crucial MX100 512GB SSDs

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