ata: libata-core: Introduce ATA_HORKAGE_NO_LOG_DIR horkage

06f6c4c6c3e8 ("ata: libata: add missing ata_identify_page_supported() calls")
introduced additional calls to ata_identify_page_supported(), thus also
adding indirectly accesses to the device log directory log page through
ata_log_supported(). Reading this log page causes SATADOM-ML 3ME devices
to lock up.

Introduce the horkage flag ATA_HORKAGE_NO_LOG_DIR to prevent accesses to
the log directory in ata_log_supported() and add a blacklist entry
with this flag for "SATADOM-ML 3ME" devices.

Fixes: 636f6e2af4fb ("libata: add horkage for missing Identify Device log")
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 67f8802..e1b1dd2 100644 (file)
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2007,6 +2007,9 @@ static bool ata_log_supported(struct ata_device *dev, u8 log)
 {
        struct ata_port *ap = dev->link->ap;
 
+       if (dev->horkage & ATA_HORKAGE_NO_LOG_DIR)
+               return false;
+
        if (ata_read_log_page(dev, ATA_LOG_DIRECTORY, 0, ap->sector_buf, 1))
                return false;
        return get_unaligned_le16(&ap->sector_buf[log * 2]) ? true : false;
@@ -4073,6 +4076,13 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
        { "WDC WD3000JD-*",             NULL,   ATA_HORKAGE_WD_BROKEN_LPM },
        { "WDC WD3200JD-*",             NULL,   ATA_HORKAGE_WD_BROKEN_LPM },
 
+       /*
+        * 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
+        * these devices.
+        */
+       { "SATADOM-ML 3ME",             NULL,   ATA_HORKAGE_NO_LOG_DIR },
+
        /* End Marker */
        { }
 };

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 605756f..7f99b4d 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -380,6 +380,7 @@ enum {
        ATA_HORKAGE_MAX_TRIM_128M = (1 << 26),  /* Limit max trim size to 128M */
        ATA_HORKAGE_NO_NCQ_ON_ATI = (1 << 27),  /* Disable NCQ on ATI chipset */
        ATA_HORKAGE_NO_ID_DEV_LOG = (1 << 28),  /* Identify device log missing */
+       ATA_HORKAGE_NO_LOG_DIR  = (1 << 29),    /* Do not read log directory */
 
         /* DMA mask for user DMA control: User visible values; DO NOT
            renumber */