[libata] ATAPI pad allocation fixes/cleanup

Use ata_pad_{alloc,free} in two drivers, to factor out common code.

Add ata_pad_{alloc,free} to two other drivers, which needed the padding
but had not been updated.

1 files changed, 5 insertions, 4 deletions

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index ae2475e4291c..e1346cddd37f 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -4091,15 +4091,16 @@ err_out:
 int ata_port_start (struct ata_port *ap)
 {
         struct device *dev = ap->host_set->dev;
+        int rc;
 
         ap->prd = dma_alloc_coherent(dev, ATA_PRD_TBL_SZ, &ap->prd_dma, GFP_KERNEL);
         if (!ap->prd)
                 return -ENOMEM;
 
-        ap->pad = dma_alloc_coherent(dev, ATA_DMA_PAD_BUF_SZ, &ap->pad_dma, GFP_KERNEL);
-        if (!ap->pad) {
+        rc = ata_pad_alloc(ap, dev);
+        if (rc) {
                 dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
-                return -ENOMEM;
+                return rc;
         }
 
         DPRINTK("prd alloc, virt %p, dma %llx\n", ap->prd, (unsigned long long) ap->prd_dma);
@@ -4125,7 +4126,7 @@ void ata_port_stop (struct ata_port *ap)
         struct device *dev = ap->host_set->dev;
 
         dma_free_coherent(dev, ATA_PRD_TBL_SZ, ap->prd, ap->prd_dma);
-        dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
+        ata_pad_free(ap, dev);
 }
 
 void ata_host_stop (struct ata_host_set *host_set)