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authorHans de Goede <hdegoede@redhat.com>2018-05-31 13:21:07 +0200
committerTejun Heo <tj@kernel.org>2018-05-31 08:45:37 -0700
commit2cfce3a86b64b53f0a70e92a6a659c720c319b45 (patch)
tree81e1cadae312e00afbf8da4959a41dd50feaf8ce /drivers/ata
parent18c9a99bce2a57dfd7e881658703b5d7469cc7b9 (diff)
libata: Drop SanDisk SD7UB3Q*G1001 NOLPM quirk
Commit 184add2ca23c ("libata: Apply NOLPM quirk for SanDisk SD7UB3Q*G1001 SSDs") disabled LPM for SanDisk SD7UB3Q*G1001 SSDs. This has lead to several reports of users of that SSD where LPM was working fine and who know have a significantly increased idle power consumption on their laptops. Likely there is another problem on the T450s from the original reporter which gets exposed by the uncore reaching deeper sleep states (higher PC-states) due to LPM being enabled. The problem as reported, a hardfreeze about once a day, already did not sound like it would be caused by LPM and the reports of the SSD working fine confirm this. The original reporter is ok with dropping the quirk. A X250 user has reported the same hard freeze problem and for him the problem went away after unrelated updates, I suspect some GPU driver stack changes fixed things. TL;DR: The original reporters problem were triggered by LPM but not an LPM issue, so drop the quirk for the SSD in question. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1583207 Cc: stable@vger.kernel.org Cc: Richard W.M. Jones <rjones@redhat.com> Cc: Lorenzo Dalrio <lorenzo.dalrio@gmail.com> Reported-by: Lorenzo Dalrio <lorenzo.dalrio@gmail.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: "Richard W.M. Jones" <rjones@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/libata-core.c3
1 files changed, 0 insertions, 3 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 346b163f6e89..9bfd2f7e4542 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4557,9 +4557,6 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
{ "SAMSUNG MZMPC128HBFU-000MV", "CXM14M1Q", ATA_HORKAGE_NOLPM, },
{ "SAMSUNG SSD PM830 mSATA *", "CXM13D1Q", ATA_HORKAGE_NOLPM, },
- /* Sandisk devices which are known to not handle LPM well */
- { "SanDisk SD7UB3Q*G1001", NULL, ATA_HORKAGE_NOLPM, },
-
/* devices that don't properly handle queued TRIM commands */
{ "Micron_M500IT_*", "MU01", ATA_HORKAGE_NO_NCQ_TRIM |
ATA_HORKAGE_ZERO_AFTER_TRIM, },