[SCSI] sas_ata: Implement sas_task_abort for ATA devices

ATA devices need special handling for sas_task_abort.  If the ATA command
came from SCSI, then we merely need to tell SCSI to abort the scsi_cmnd.
However, internal commands require a bit more work--we need to fill the qc
with the appropriate error status and complete the command, and eventually
post_internal will issue the actual ABORT TASK.

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/include/scsi/sas_ata.h b/include/scsi/sas_ata.h
index 72a1904..3407c81 100644
--- a/include/scsi/sas_ata.h
+++ b/include/scsi/sas_ata.h
@@ -36,4 +36,6 @@
 int sas_ata_init_host_and_port(struct domain_device *found_dev,
 			       struct scsi_target *starget);
 
+void sas_ata_task_abort(struct sas_task *task);
+
 #endif /* _SAS_ATA_H_ */