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

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Message-ID: <CAAZ0mTfQ+feHUeRjC3aH9z=sM92XmXASY+3ELzwXJLfk30h_6A@mail.gmail.com>
Date: Wed, 23 Apr 2025 20:21:17 +0300
From: Mikko Juhani Korhonen <mjkorhon@...il.com>
To: Damien Le Moal <dlemoal@...nel.org>, Niklas Cassel <cassel@...nel.org>, linux-ide@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: [PATCH] libata: disable LPM for WDC WD20EFAX-68FB5N0 hard drive

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>

diff -u linux-6.14.3/drivers/ata/libata-core.c
linux-6.14.3-mk/drivers/ata/libata-core.c
--- linux-6.14.3/drivers/ata/libata-core.c      2025-04-20
11:23:22.000000000 +0300
+++ linux-6.14.3-mk/drivers/ata/libata-core.c   2025-04-22
16:53:52.341934384 +0300
@@ -4238,6 +4238,11 @@
       { "WDC WD2500JD-*",             NULL,   ATA_QUIRK_WD_BROKEN_LPM },
       { "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