1 files changed, 15 insertions, 1 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c47373f01f8..06b7e49e039 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -160,6 +160,10 @@ int libata_allow_tpm = 0;
 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
 MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
 
+static int atapi_an;
+module_param(atapi_an, int, 0444);
+MODULE_PARM_DESC(atapi_an, "Enable ATAPI AN media presence notification (0=0ff [default], 1=on)");
+
 MODULE_AUTHOR("Jeff Garzik");
 MODULE_DESCRIPTION("Library module for ATA devices");
 MODULE_LICENSE("GPL");
@@ -2122,6 +2126,14 @@ retry:
                 goto err_out;
         }
 
+        if (dev->horkage & ATA_HORKAGE_DUMP_ID) {
+                ata_dev_printk(dev, KERN_DEBUG, "dumping IDENTIFY data, "
+                               "class=%d may_fallback=%d tried_spinup=%d\n",
+                               class, may_fallback, tried_spinup);
+                print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET,
+                               16, 2, id, ATA_ID_WORDS * sizeof(*id), true);
+        }
+
         /* Falling back doesn't make sense if ID data was read
          * successfully at least once.
          */
@@ -2510,7 +2522,8 @@ int ata_dev_configure(struct ata_device *dev)
                  * to enable ATAPI AN to discern between PHY status
                  * changed notifications and ATAPI ANs.
                  */
-                if ((ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
+                if (atapi_an &&
+                    (ap->flags & ATA_FLAG_AN) && ata_id_has_atapi_AN(id) &&
                     (!sata_pmp_attached(ap) ||
                      sata_scr_read(&ap->link, SCR_NOTIFICATION, &sntf) == 0)) {
                         unsigned int err_mask;
@@ -6372,6 +6385,7 @@ static int __init ata_parse_force_one(char **cur,
                 { "3.0Gbps",    .spd_limit      = 2 },
                 { "noncq",      .horkage_on     = ATA_HORKAGE_NONCQ },
                 { "ncq",        .horkage_off    = ATA_HORKAGE_NONCQ },
+                { "dump_id",    .horkage_on     = ATA_HORKAGE_DUMP_ID },
                 { "pio0",       .xfer_mask      = 1 << (ATA_SHIFT_PIO + 0) },
                 { "pio1",       .xfer_mask      = 1 << (ATA_SHIFT_PIO + 1) },
                 { "pio2",       .xfer_mask      = 1 << (ATA_SHIFT_PIO + 2) },