Commit ecd75ad5 authored by Tejun Heo's avatar Tejun Heo
Browse files

libata: disable LPM for some WD SATA-I devices 



For some reason, some early WD drives spin up and down drives
erratically when the link is put into slumber mode which can reduce
the life expectancy of the device significantly.  Unfortunately, we
don't have full list of devices and given the nature of the issue it'd
be better to err on the side of false positives than the other way
around.  Let's disable LPM on all WD devices which match one of the
known problematic model prefixes and are SATA-I.

As horkage list doesn't support matching SATA capabilities, this is
implemented as two horkages - WD_BROKEN_LPM and NOLPM.  The former is
set for the known prefixes and sets the latter if the matched device
is SATA-I.

Note that this isn't optimal as this disables all LPM operations and
partial link power state reportedly works fine on these; however, the
way LPM is implemented in libata makes it difficult to precisely map
libata LPM setting to specific link power state.  Well, these devices
are already fairly outdated.  Let's just disable whole LPM for now.

Signed-off-by: default avatarTejun Heo <tj@kernel.org>
Reported-and-tested-by: default avatarNikos Barkas <levelwol@gmail.com>
Reported-and-tested-by: default avatarIoannis Barkas <risc4all@yahoo.com>
References: https://bugzilla.kernel.org/show_bug.cgi?id=57211
Cc: stable@vger.kernel.org
parent 6e1af697

drivers/ata/libata-core.c

+27 −0
Original line number Original line Diff line number Diff line
@@ -2222,6 +2222,16 @@ int ata_dev_configure(struct ata_device *dev) 
	if (rc)

	if (rc)

		return rc;

		return rc;





	/* some WD SATA-1 drives have issues with LPM, turn on NOLPM for them */

	if ((dev->horkage & ATA_HORKAGE_WD_BROKEN_LPM) &&

	    (id[ATA_ID_SATA_CAPABILITY] & 0xe) == 0x2)

		dev->horkage |= ATA_HORKAGE_NOLPM;



	if (dev->horkage & ATA_HORKAGE_NOLPM) {

		ata_dev_warn(dev, "LPM support broken, forcing max_power\n");

		dev->link->ap->target_lpm_policy = ATA_LPM_MAX_POWER;

	}



	/* let ACPI work its magic */

	/* let ACPI work its magic */

	rc = ata_acpi_on_devcfg(dev);

	rc = ata_acpi_on_devcfg(dev);

	if (rc)

	if (rc)
@@ -4216,6 +4226,23 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = { 
	{ "Micron_M500*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM, },

	{ "Micron_M500*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM, },

	{ "Crucial_CT???M500SSD1",	NULL,	ATA_HORKAGE_NO_NCQ_TRIM, },

	{ "Crucial_CT???M500SSD1",	NULL,	ATA_HORKAGE_NO_NCQ_TRIM, },





	/*

	 * Some WD SATA-I drives spin up and down erratically when the link

	 * is put into the slumber mode.  We don't have full list of the

	 * affected devices.  Disable LPM if the device matches one of the

	 * known prefixes and is SATA-1.  As a side effect LPM partial is

	 * lost too.

	 *

	 * https://bugzilla.kernel.org/show_bug.cgi?id=57211

	 */

	{ "WDC WD800JD-*",		NULL,	ATA_HORKAGE_WD_BROKEN_LPM },

	{ "WDC WD1200JD-*",		NULL,	ATA_HORKAGE_WD_BROKEN_LPM },

	{ "WDC WD1600JD-*",		NULL,	ATA_HORKAGE_WD_BROKEN_LPM },

	{ "WDC WD2000JD-*",		NULL,	ATA_HORKAGE_WD_BROKEN_LPM },

	{ "WDC WD2500JD-*",		NULL,	ATA_HORKAGE_WD_BROKEN_LPM },

	{ "WDC WD3000JD-*",		NULL,	ATA_HORKAGE_WD_BROKEN_LPM },

	{ "WDC WD3200JD-*",		NULL,	ATA_HORKAGE_WD_BROKEN_LPM },



	/* End Marker */

	/* End Marker */

	{ }

	{ }

};

};

drivers/ata/libata-scsi.c

+15 −3
Original line number Original line Diff line number Diff line
@@ -111,12 +111,14 @@ static const char *ata_lpm_policy_names[] = { 
	[ATA_LPM_MIN_POWER]	= "min_power",

	[ATA_LPM_MIN_POWER]	= "min_power",

};

};





static ssize_t ata_scsi_lpm_store(struct device *dev,

static ssize_t ata_scsi_lpm_store(struct device *device,

				  struct device_attribute *attr,

				  struct device_attribute *attr,

				  const char *buf, size_t count)

				  const char *buf, size_t count)

{

{

	struct Scsi_Host *shost = class_to_shost(dev);

	struct Scsi_Host *shost = class_to_shost(device);

	struct ata_port *ap = ata_shost_to_port(shost);

	struct ata_port *ap = ata_shost_to_port(shost);

	struct ata_link *link;

	struct ata_device *dev;

	enum ata_lpm_policy policy;

	enum ata_lpm_policy policy;

	unsigned long flags;

	unsigned long flags;
@@ -132,10 +134,20 @@ static ssize_t ata_scsi_lpm_store(struct device *dev, 
		return -EINVAL;

		return -EINVAL;





	spin_lock_irqsave(ap->lock, flags);

	spin_lock_irqsave(ap->lock, flags);



	ata_for_each_link(link, ap, EDGE) {

		ata_for_each_dev(dev, &ap->link, ENABLED) {

			if (dev->horkage & ATA_HORKAGE_NOLPM) {

				count = -EOPNOTSUPP;

				goto out_unlock;

			}

		}

	}



	ap->target_lpm_policy = policy;

	ap->target_lpm_policy = policy;

	ata_port_schedule_eh(ap);

	ata_port_schedule_eh(ap);

out_unlock:

	spin_unlock_irqrestore(ap->lock, flags);

	spin_unlock_irqrestore(ap->lock, flags);



	return count;

	return count;

}

}

include/linux/libata.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -419,6 +419,8 @@ enum { 
	ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17),	/* Set max sects to 65535 */

	ATA_HORKAGE_MAX_SEC_LBA48 = (1 << 17),	/* Set max sects to 65535 */

	ATA_HORKAGE_ATAPI_DMADIR = (1 << 18),	/* device requires dmadir */

	ATA_HORKAGE_ATAPI_DMADIR = (1 << 18),	/* device requires dmadir */

	ATA_HORKAGE_NO_NCQ_TRIM	= (1 << 19),	/* don't use queued TRIM */

	ATA_HORKAGE_NO_NCQ_TRIM	= (1 << 19),	/* don't use queued TRIM */

	ATA_HORKAGE_NOLPM	= (1 << 20),	/* don't use LPM */

	ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21),	/* some WDs have broken LPM */





	 /* DMA mask for user DMA control: User visible values; DO NOT

	 /* DMA mask for user DMA control: User visible values; DO NOT

	    renumber */

	    renumber */

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