1 files changed, 8 insertions, 1 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index e5d6d7f8e6dc..5a403e434ff8 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -108,7 +108,9 @@ enum {
         LIBATA_MAX_PRD          = ATA_MAX_PRD / 2,
         ATA_MAX_PORTS           = 8,
         ATA_DEF_QUEUE           = 1,
-        ATA_MAX_QUEUE           = 1,
+        /* tag ATA_MAX_QUEUE - 1 is reserved for internal commands */
+        ATA_MAX_QUEUE           = 2,
+        ATA_TAG_INTERNAL        = ATA_MAX_QUEUE - 1,
         ATA_MAX_SECTORS         = 200,  /* FIXME */
         ATA_MAX_BUS             = 2,
         ATA_DEF_BUSY_WAIT       = 10000,
@@ -717,6 +719,11 @@ static inline unsigned int ata_tag_valid(unsigned int tag)
         return (tag < ATA_MAX_QUEUE) ? 1 : 0;
 }
 
+static inline unsigned int ata_tag_internal(unsigned int tag)
+{
+        return tag == ATA_MAX_QUEUE - 1;
+}
+
 static inline unsigned int ata_class_enabled(unsigned int class)
 {
         return class == ATA_DEV_ATA || class == ATA_DEV_ATAPI;