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authorHans de Goede <hdegoede@redhat.com>2018-05-31 13:21:07 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-06-26 08:08:08 +0800
commit139cd53baf08d80db81eb32a72dc24501cb8f296 (patch)
tree5124d4a8a21ade9031974b2a7c9c0fb55b7cba93
parent0e9806ec7376e1a285d7b9ee634a782f10155540 (diff)
libata: Drop SanDisk SD7UB3Q*G1001 NOLPM quirk
commit 2cfce3a86b64b53f0a70e92a6a659c720c319b45 upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-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 0e2c0ac5792d..82c59a143a14 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4426,9 +4426,6 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
ATA_HORKAGE_ZERO_AFTER_TRIM |
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, },