3 files changed, 18 insertions, 3 deletions

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 711595390996..62c4b328b0b6 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2354,6 +2354,18 @@ int ata_cable_unknown(struct ata_port *ap)
 }
 
 /**
+ *      ata_cable_ignore        -       return ignored PATA cable.
+ *      @ap: port
+ *
+ *      Helper method for drivers which don't use cable type to limit
+ *      transfer mode.
+ */
+int ata_cable_ignore(struct ata_port *ap)
+{
+        return ATA_CBL_PATA_IGN;
+}
+
+/**
  *      ata_cable_sata  -       return SATA cable type
  *      @ap: port
  *
@@ -7665,4 +7677,5 @@ EXPORT_SYMBOL_GPL(ata_dev_try_classify);
 EXPORT_SYMBOL_GPL(ata_cable_40wire);
 EXPORT_SYMBOL_GPL(ata_cable_80wire);
 EXPORT_SYMBOL_GPL(ata_cable_unknown);
+EXPORT_SYMBOL_GPL(ata_cable_ignore);
 EXPORT_SYMBOL_GPL(ata_cable_sata);
diff --git a/include/linux/ata.h b/include/linux/ata.h
index 43fecf62773a..c17e9404c88d 100644
--- a/include/linux/ata.h
+++ b/include/linux/ata.h
@@ -286,9 +286,10 @@ enum {
         ATA_CBL_NONE            = 0,
         ATA_CBL_PATA40          = 1,
         ATA_CBL_PATA80          = 2,
-        ATA_CBL_PATA40_SHORT    = 3,            /* 40 wire cable to high UDMA spec */
-        ATA_CBL_PATA_UNK        = 4,
-        ATA_CBL_SATA            = 5,
+        ATA_CBL_PATA40_SHORT    = 3,    /* 40 wire cable to high UDMA spec */
+        ATA_CBL_PATA_UNK        = 4,    /* don't know, maybe 80c? */
+        ATA_CBL_PATA_IGN        = 5,    /* don't know, ignore cable handling */
+        ATA_CBL_SATA            = 6,
 
         /* SATA Status and Control Registers */
         SCR_STATUS              = 0,
diff --git a/include/linux/libata.h b/include/linux/libata.h
index d9eb20c67bb6..bdb7c6e13993 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -927,6 +927,7 @@ extern u8 ata_irq_on(struct ata_port *ap);
 extern int ata_cable_40wire(struct ata_port *ap);
 extern int ata_cable_80wire(struct ata_port *ap);
 extern int ata_cable_sata(struct ata_port *ap);
+extern int ata_cable_ignore(struct ata_port *ap);
 extern int ata_cable_unknown(struct ata_port *ap);
 
 /*