linux-kernel - [PATCH v2] ata: libata: disable LPM for WDC WD20EFAX-68FB5N0 hard drives

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Message-ID: <CAAZ0mTdUkG5yp+XkBGE9Wc2V8np6r-DyNJSCa7Yo0k2bNzuq9w@mail.gmail.com>
Date: Thu, 24 Apr 2025 23:43:02 +0300
From: Mikko Juhani Korhonen <mjkorhon@...il.com>
To: Damien Le Moal <dlemoal@...nel.org>
Cc: Niklas Cassel <cassel@...nel.org>, linux-ide@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: [PATCH v2] ata: libata: disable LPM for WDC WD20EFAX-68FB5N0 hard drives

Make WDC WD20EFAX-68FB5N0 hard drive work again
after regression in 6.9.0 when LPM was enabled,
so disable it for this model

Signed-off-by: Mikko Korhonen <mjkorhon@...il.com>
---
drivers/ata/libata-core.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index d956735e2a76..c429ba259548 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4208,6 +4208,11 @@ static const struct ata_dev_quirks_entry
__ata_dev_quirks[] = {
       { "WDC WD3000JD-*",             NULL,   ATA_QUIRK_WD_BROKEN_LPM },
       { "WDC WD3200JD-*",             NULL,   ATA_QUIRK_WD_BROKEN_LPM },

+       /*
+        * This specific WD SATA-3 model has problems with LPM.
+        */
+       { "WDC WD20EFAX-68FB5N0",       NULL,   ATA_QUIRK_NOLPM },
+
       /*
        * This sata dom device goes on a walkabout when the ATA_LOG_DIRECTORY
        * log page is accessed. Ensure we never ask for this log page with

base-commit: 38fec10eb60d687e30c8c6b5420d86e8149f7557
--
2.47.2