[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.
diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 8420204..4612312 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -307,21 +307,22 @@
void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
void *mem;
dma_addr_t mem_dma;
+ int rc;
pp = kmalloc(sizeof(*pp), GFP_KERNEL);
if (!pp)
return -ENOMEM;
memset(pp, 0, sizeof(*pp));
- 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) {
kfree(pp);
- return -ENOMEM;
+ return rc;
}
mem = dma_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma, GFP_KERNEL);
if (!mem) {
- dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
+ ata_pad_free(ap, dev);
kfree(pp);
return -ENOMEM;
}
@@ -397,7 +398,7 @@
ap->private_data = NULL;
dma_free_coherent(dev, AHCI_PORT_PRIV_DMA_SZ,
pp->cmd_slot, pp->cmd_slot_dma);
- dma_free_coherent(dev, ATA_DMA_PAD_BUF_SZ, ap->pad, ap->pad_dma);
+ ata_pad_free(ap, dev);
kfree(pp);
}
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index ae2475e..e1346cd 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -4091,15 +4091,16 @@
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 @@
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)
diff --git a/drivers/scsi/sata_mv.c b/drivers/scsi/sata_mv.c
index 64af334..0f469e3 100644
--- a/drivers/scsi/sata_mv.c
+++ b/drivers/scsi/sata_mv.c
@@ -670,6 +670,11 @@
ata_host_stop(host_set);
}
+static inline void mv_priv_free(struct mv_port_priv *pp, struct device *dev)
+{
+ dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma);
+}
+
/**
* mv_port_start - Port specific init/start routine.
* @ap: ATA channel to manipulate
@@ -687,21 +692,23 @@
void __iomem *port_mmio = mv_ap_base(ap);
void *mem;
dma_addr_t mem_dma;
+ int rc = -ENOMEM;
pp = kmalloc(sizeof(*pp), GFP_KERNEL);
- if (!pp) {
- return -ENOMEM;
- }
+ if (!pp)
+ goto err_out;
memset(pp, 0, sizeof(*pp));
mem = dma_alloc_coherent(dev, MV_PORT_PRIV_DMA_SZ, &mem_dma,
GFP_KERNEL);
- if (!mem) {
- kfree(pp);
- return -ENOMEM;
- }
+ if (!mem)
+ goto err_out_pp;
memset(mem, 0, MV_PORT_PRIV_DMA_SZ);
+ rc = ata_pad_alloc(ap, dev);
+ if (rc)
+ goto err_out_priv;
+
/* First item in chunk of DMA memory:
* 32-slot command request table (CRQB), 32 bytes each in size
*/
@@ -746,6 +753,13 @@
*/
ap->private_data = pp;
return 0;
+
+err_out_priv:
+ mv_priv_free(pp, dev);
+err_out_pp:
+ kfree(pp);
+err_out:
+ return rc;
}
/**
@@ -768,7 +782,8 @@
spin_unlock_irqrestore(&ap->host_set->lock, flags);
ap->private_data = NULL;
- dma_free_coherent(dev, MV_PORT_PRIV_DMA_SZ, pp->crpb, pp->crpb_dma);
+ ata_pad_free(ap, dev);
+ mv_priv_free(pp, dev);
kfree(pp);
}
diff --git a/drivers/scsi/sata_sil24.c b/drivers/scsi/sata_sil24.c
index 211ec7e..e6c8e89 100644
--- a/drivers/scsi/sata_sil24.c
+++ b/drivers/scsi/sata_sil24.c
@@ -635,6 +635,13 @@
return IRQ_RETVAL(handled);
}
+static inline void sil24_cblk_free(struct sil24_port_priv *pp, struct device *dev)
+{
+ const size_t cb_size = sizeof(*pp->cmd_block);
+
+ dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma);
+}
+
static int sil24_port_start(struct ata_port *ap)
{
struct device *dev = ap->host_set->dev;
@@ -642,36 +649,44 @@
struct sil24_cmd_block *cb;
size_t cb_size = sizeof(*cb);
dma_addr_t cb_dma;
+ int rc = -ENOMEM;
- pp = kmalloc(sizeof(*pp), GFP_KERNEL);
+ pp = kzalloc(sizeof(*pp), GFP_KERNEL);
if (!pp)
- return -ENOMEM;
- memset(pp, 0, sizeof(*pp));
+ goto err_out;
pp->tf.command = ATA_DRDY;
cb = dma_alloc_coherent(dev, cb_size, &cb_dma, GFP_KERNEL);
- if (!cb) {
- kfree(pp);
- return -ENOMEM;
- }
+ if (!cb)
+ goto err_out_pp;
memset(cb, 0, cb_size);
+ rc = ata_pad_alloc(ap, dev);
+ if (rc)
+ goto err_out_pad;
+
pp->cmd_block = cb;
pp->cmd_block_dma = cb_dma;
ap->private_data = pp;
return 0;
+
+err_out_pad:
+ sil24_cblk_free(pp, dev);
+err_out_pp:
+ kfree(pp);
+err_out:
+ return rc;
}
static void sil24_port_stop(struct ata_port *ap)
{
struct device *dev = ap->host_set->dev;
struct sil24_port_priv *pp = ap->private_data;
- size_t cb_size = sizeof(*pp->cmd_block);
- dma_free_coherent(dev, cb_size, pp->cmd_block, pp->cmd_block_dma);
+ sil24_cblk_free(pp, dev);
kfree(pp);
}