libata: add ata_sg_is_last() helper, use it in several drivers
diff --git a/drivers/scsi/pdc_adma.c b/drivers/scsi/pdc_adma.c
index 53b8db4..c6825da 100644
--- a/drivers/scsi/pdc_adma.c
+++ b/drivers/scsi/pdc_adma.c
@@ -293,14 +293,14 @@
static int adma_fill_sg(struct ata_queued_cmd *qc)
{
- struct scatterlist *sg = qc->sg;
+ struct scatterlist *sg;
struct ata_port *ap = qc->ap;
struct adma_port_priv *pp = ap->private_data;
u8 *buf = pp->pkt;
- int nelem, i = (2 + buf[3]) * 8;
+ int i = (2 + buf[3]) * 8;
u8 pFLAGS = pORD | ((qc->tf.flags & ATA_TFLAG_WRITE) ? pDIRO : 0);
- for (nelem = 0; nelem < qc->n_elem; nelem++,sg++) {
+ ata_for_each_sg(sg, qc) {
u32 addr;
u32 len;
@@ -312,7 +312,7 @@
*(__le32 *)(buf + i) = cpu_to_le32(len);
i += 4;
- if ((nelem + 1) == qc->n_elem)
+ if (ata_sg_is_last(sg, qc))
pFLAGS |= pEND;
buf[i++] = pFLAGS;
buf[i++] = qc->dev->dma_mode & 0xf;