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-rw-r--r--drivers/ata/libata-core.c61
1 files changed, 35 insertions, 26 deletions
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index c2d3785ec227..ca75823697dd 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -4816,32 +4816,6 @@ static unsigned int ata_dev_init_params(struct ata_device *dev,
}
/**
- * ata_sg_clean - Unmap DMA memory associated with command
- * @qc: Command containing DMA memory to be released
- *
- * Unmap all mapped DMA memory associated with this command.
- *
- * LOCKING:
- * spin_lock_irqsave(host lock)
- */
-void ata_sg_clean(struct ata_queued_cmd *qc)
-{
- struct ata_port *ap = qc->ap;
- struct scatterlist *sg = qc->sg;
- int dir = qc->dma_dir;
-
- WARN_ON_ONCE(sg == NULL);
-
- VPRINTK("unmapping %u sg elements\n", qc->n_elem);
-
- if (qc->n_elem)
- dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
-
- qc->flags &= ~ATA_QCFLAG_DMAMAP;
- qc->sg = NULL;
-}
-
-/**
* atapi_check_dma - Check whether ATAPI DMA can be supported
* @qc: Metadata associated with taskfile to check
*
@@ -4925,6 +4899,34 @@ void ata_sg_init(struct ata_queued_cmd *qc, struct scatterlist *sg,
qc->cursg = qc->sg;
}
+#ifdef CONFIG_HAS_DMA
+
+/**
+ * ata_sg_clean - Unmap DMA memory associated with command
+ * @qc: Command containing DMA memory to be released
+ *
+ * Unmap all mapped DMA memory associated with this command.
+ *
+ * LOCKING:
+ * spin_lock_irqsave(host lock)
+ */
+void ata_sg_clean(struct ata_queued_cmd *qc)
+{
+ struct ata_port *ap = qc->ap;
+ struct scatterlist *sg = qc->sg;
+ int dir = qc->dma_dir;
+
+ WARN_ON_ONCE(sg == NULL);
+
+ VPRINTK("unmapping %u sg elements\n", qc->n_elem);
+
+ if (qc->n_elem)
+ dma_unmap_sg(ap->dev, sg, qc->orig_n_elem, dir);
+
+ qc->flags &= ~ATA_QCFLAG_DMAMAP;
+ qc->sg = NULL;
+}
+
/**
* ata_sg_setup - DMA-map the scatter-gather table associated with a command.
* @qc: Command with scatter-gather table to be mapped.
@@ -4957,6 +4959,13 @@ static int ata_sg_setup(struct ata_queued_cmd *qc)
return 0;
}
+#else /* !CONFIG_HAS_DMA */
+
+static inline void ata_sg_clean(struct ata_queued_cmd *qc) {}
+static inline int ata_sg_setup(struct ata_queued_cmd *qc) { return -1; }
+
+#endif /* !CONFIG_HAS_DMA */
+
/**
* swap_buf_le16 - swap halves of 16-bit words in place
* @buf: Buffer to swap

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