libata: blacklist Seagate drives which time out FLUSH_CACHE when used with NCQ

Some recent Seagate harddrives have firmware bug which causes FLUSH
CACHE to timeout under certain circumstances if NCQ is being used.
This can be worked around by disabling NCQ and fixed by updating the
firmware.  Implement ATA_HORKAGE_FIRMWARE_UPDATE and blacklist these
devices.

The wiki page has been updated to contain information on this issue.

  http://ata.wiki.kernel.org/index.php/Known_issues

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

2 files changed, 22 insertions, 0 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 4214bfb13bbd..5e2eb740df46 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2492,6 +2492,13 @@ int ata_dev_configure(struct ata_device *dev)
                 }
         }
 
+        if ((dev->horkage & ATA_HORKAGE_FIRMWARE_WARN) && print_info) {
+                ata_dev_printk(dev, KERN_WARNING, "WARNING: device requires "
+                               "firmware update to be fully functional.\n");
+                ata_dev_printk(dev, KERN_WARNING, "         contact the vendor "
+                               "or visit http://ata.wiki.kernel.org.\n");
+        }
+
         return 0;
 
 err_out_nosup:
@@ -4042,6 +4049,20 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
         { "ST380817AS",         "3.42",         ATA_HORKAGE_NONCQ },
         { "ST3160023AS",        "3.42",         ATA_HORKAGE_NONCQ },
 
+        /* Seagate NCQ + FLUSH CACHE firmware bug */
+        { "ST31500341AS",       "9JU138",       ATA_HORKAGE_NONCQ |
+                                                ATA_HORKAGE_FIRMWARE_WARN },
+        { "ST31000333AS",       "9FZ136",       ATA_HORKAGE_NONCQ |
+                                                ATA_HORKAGE_FIRMWARE_WARN },
+        { "ST3640623AS",        "9FZ164",       ATA_HORKAGE_NONCQ |
+                                                ATA_HORKAGE_FIRMWARE_WARN },
+        { "ST3640323AS",        "9FZ134",       ATA_HORKAGE_NONCQ |
+                                                ATA_HORKAGE_FIRMWARE_WARN },
+        { "ST3320813AS",        "9FZ182",       ATA_HORKAGE_NONCQ |
+                                                ATA_HORKAGE_FIRMWARE_WARN },
+        { "ST3320613AS",        "9FZ162",       ATA_HORKAGE_NONCQ |
+                                                ATA_HORKAGE_FIRMWARE_WARN },
+
         /* Blacklist entries taken from Silicon Image 3124/3132
            Windows driver .inf file - also several Linux problem reports */
         { "HTS541060G9SA00",    "MB3OC60D",     ATA_HORKAGE_NONCQ, },
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 59b0f1c807b5..ed3f26eb5df1 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -375,6 +375,7 @@ enum {
         ATA_HORKAGE_BRIDGE_OK   = (1 << 10),    /* no bridge limits */
         ATA_HORKAGE_ATAPI_MOD16_DMA = (1 << 11), /* use ATAPI DMA for commands
                                                     not multiple of 16 bytes */
+        ATA_HORKAGE_FIRMWARE_WARN = (1 << 12),  /* firwmare update warning */
 
          /* DMA mask for user DMA control: User visible values; DO NOT
             renumber */