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libata: kill port_info->sht and ->irq_handler 

libata core layer doesn't care about sht or ->irq_handler.  Those are
only of interest to the LLD during initialization.  This is confusing
and has caused several drivers to have duplicate unused initializers
for these fields.

Currently only sata_nv uses these fields.  Make sata_nv use
->private_data, which is supposed to carry LLD-specific information,
instead and kill ->sht and ->irq_handler.  nv_pi_priv structure is
defined and struct literals are used to initialize private_data.
Notational overhead is negligible.

Signed-off-by: Tejun Heo <htejun@gmail.com>
This commit is contained in:
Tejun Heo 2008-03-25 12:22:49 +09:00 committed by Jeff Garzik
parent 887125e374
commit 9594719362
2 changed files with 17 additions and 14 deletions
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29
drivers/ata/sata_nv.c
View File

@ -466,58 +466,61 @@ static struct ata_port_operations nv_swncq_ops = {
.port_start = nv_swncq_port_start,
};
struct nv_pi_priv {
irq_handler_t irq_handler;
struct scsi_host_template *sht;
};
#define NV_PI_PRIV(_irq_handler, _sht) \
&(struct nv_pi_priv){ .irq_handler = _irq_handler, .sht = _sht }
static const struct ata_port_info nv_port_info[] = {
/* generic */
{
.sht = &nv_sht,
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_generic_ops,
.irq_handler = nv_generic_interrupt,
.private_data = NV_PI_PRIV(nv_generic_interrupt, &nv_sht),
},
/* nforce2/3 */
{
.sht = &nv_sht,
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_nf2_ops,
.irq_handler = nv_nf2_interrupt,
.private_data = NV_PI_PRIV(nv_nf2_interrupt, &nv_sht),
},
/* ck804 */
{
.sht = &nv_sht,
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_ck804_ops,
.irq_handler = nv_ck804_interrupt,
.private_data = NV_PI_PRIV(nv_ck804_interrupt, &nv_sht),
},
/* ADMA */
{
.sht = &nv_adma_sht,
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_MMIO | ATA_FLAG_NCQ,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_adma_ops,
.irq_handler = nv_adma_interrupt,
.private_data = NV_PI_PRIV(nv_adma_interrupt, &nv_adma_sht),
},
/* SWNCQ */
{
.sht = &nv_swncq_sht,
.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
ATA_FLAG_NCQ,
.pio_mask = NV_PIO_MASK,
.mwdma_mask = NV_MWDMA_MASK,
.udma_mask = NV_UDMA_MASK,
.port_ops = &nv_swncq_ops,
.irq_handler = nv_swncq_interrupt,
.private_data = NV_PI_PRIV(nv_swncq_interrupt, &nv_swncq_sht),
},
};
@ -2316,6 +2319,7 @@ static int nv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
static int printed_version;
const struct ata_port_info *ppi[] = { NULL, NULL };
struct nv_pi_priv *ipriv;
struct ata_host *host;
struct nv_host_priv *hpriv;
int rc;
@ -2352,6 +2356,7 @@ static int nv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
}
ppi[0] = &nv_port_info[type];
ipriv = ppi[0]->private_data;
rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
if (rc)
return rc;
@ -2390,8 +2395,8 @@ static int nv_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
nv_swncq_host_init(host);
pci_set_master(pdev);
return ata_host_activate(host, pdev->irq, ppi[0]->irq_handler,
IRQF_SHARED, ppi[0]->sht);
return ata_host_activate(host, pdev->irq, ipriv->irq_handler,
IRQF_SHARED, ipriv->sht);
}
#ifdef CONFIG_PM

2
include/linux/libata.h
View File

@ -748,14 +748,12 @@ struct ata_port_operations {
};
struct ata_port_info {
struct scsi_host_template *sht;
unsigned long flags;
unsigned long link_flags;
unsigned long pio_mask;
unsigned long mwdma_mask;
unsigned long udma_mask;
struct ata_port_operations *port_ops;
irq_handler_t irq_handler;
void *private_data;
};