1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index c3820f105ffa..b0d4ca0d27b4 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -272,6 +272,10 @@ enum {
         /* ering size */
         ATA_ERING_SIZE          = 32,
 
+        /* return values for ->qc_defer */
+        ATA_DEFER_LINK          = 1,
+        ATA_DEFER_PORT          = 2,
+
         /* desc_len for ata_eh_info and context */
         ATA_EH_DESC_LEN         = 80,
 
@@ -639,6 +643,7 @@ struct ata_port_operations {
 
         void (*data_xfer) (struct ata_device *, unsigned char *, unsigned int, int);
 
+        int (*qc_defer) (struct ata_queued_cmd *qc);
         void (*qc_prep) (struct ata_queued_cmd *qc);
         unsigned int (*qc_issue) (struct ata_queued_cmd *qc);
 
@@ -824,6 +829,7 @@ extern void ata_data_xfer(struct ata_device *adev, unsigned char *buf,
                           unsigned int buflen, int write_data);
 extern void ata_data_xfer_noirq(struct ata_device *adev, unsigned char *buf,
                                 unsigned int buflen, int write_data);
+extern int ata_std_qc_defer(struct ata_queued_cmd *qc);
 extern void ata_dumb_qc_prep(struct ata_queued_cmd *qc);
 extern void ata_qc_prep(struct ata_queued_cmd *qc);
 extern void ata_noop_qc_prep(struct ata_queued_cmd *qc);