[PATCH] libata-dev: Make the the in_wq check as an inline function

Make the the in_wq check easier to read as an inline function.

Signed-off-by: Albert Lee <albertcc@tw.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 28 insertions, 6 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 61c120dae74d..27078c06119a 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -3536,6 +3536,33 @@ err_out:
 }
 
 /**
+ *      ata_hsm_ok_in_wq - Check if the qc can be handled in the workqueue.
+ *      @ap: the target ata_port
+ *      @qc: qc on going
+ *
+ *      RETURNS:
+ *      1 if ok in workqueue, 0 otherwise.
+ */
+
+static inline int ata_hsm_ok_in_wq(struct ata_port *ap, struct ata_queued_cmd *qc)
+{
+        if (qc->tf.flags & ATA_TFLAG_POLLING)
+                return 1;
+
+        if (ap->hsm_task_state == HSM_ST_FIRST) {
+                if (qc->tf.protocol == ATA_PROT_PIO &&
+                    (qc->tf.flags & ATA_TFLAG_WRITE))
+                    return 1;
+
+                if (is_atapi_taskfile(&qc->tf) &&
+                    !(qc->dev->flags & ATA_DFLAG_CDB_INTR))
+                        return 1;
+        }
+
+        return 0;
+}
+
+/**
  *      ata_hsm_move - move the HSM to the next state.
  *      @ap: the target ata_port
  *      @qc: qc on going
@@ -3558,12 +3585,7 @@ static int ata_hsm_move(struct ata_port *ap, struct ata_queued_cmd *qc,
          * like DMA polling into the workqueue. Notice that
          * in_wq is not equivalent to (qc->tf.flags & ATA_TFLAG_POLLING).
          */
-        WARN_ON(in_wq != ((qc->tf.flags & ATA_TFLAG_POLLING) ||
-                          (ap->hsm_task_state == HSM_ST_FIRST &&
-                           ((qc->tf.protocol == ATA_PROT_PIO &&
-                             (qc->tf.flags & ATA_TFLAG_WRITE)) ||
-                            (is_atapi_taskfile(&qc->tf) &&
-                             !(qc->dev->flags & ATA_DFLAG_CDB_INTR))))));
+        WARN_ON(in_wq != ata_hsm_ok_in_wq(ap, qc));
 
         /* check error */
         if (unlikely(status & (ATA_ERR | ATA_DF))) {