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libata: stop overloading port_info->private_data

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port_info->private_data is currently used for two purposes - to record
private data about the port_info or to specify host->private_data to
use when allocating ata_host.

This overloading is confusing and counter-intuitive in that
port_info->private_data becomes host->private_data instead of
port->private_data.  In addition, port_info and host don't correspond
to each other 1-to-1.  Currently, the first non-NULL
port_info->private_data is used.

This patch makes port_info->private_data just be what it is -
private_data for the port_info where LLD can jot down extra info.
libata no longer sets host->private_data to the first non-NULL
port_info->private_data, @host_priv argument is added to
ata_pci_init_one() instead.  LLDs which use ata_pci_init_one() can use
this argument to pass in pointer to host private data.  LLDs which
don't should use init-register model anyway and can initialize
host->private_data directly.

Adding @host_priv instead of using init-register model for LLDs which
use ata_pci_init_one() is suggested by Alan Cox.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
This commit is contained in:
Tejun Heo
2008-03-25 12:22:49 +09:00
committed by Jeff Garzik
parent 1bd5b715a3
commit 887125e374
39 changed files with 79 additions and 145 deletions
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27
drivers/ata/pata_amd.c
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@@ -144,12 +144,6 @@ static int amd_pre_reset(struct ata_link *link, unsigned long deadline)
return ata_std_prereset(link, deadline);
}
static void amd_error_handler(struct ata_port *ap)
{
ata_bmdma_drive_eh(ap, amd_pre_reset, ata_std_softreset, NULL,
ata_std_postreset);
}
static int amd_cable_detect(struct ata_port *ap)
{
static const u32 bitmask[2] = {0x03, 0x0C};
@@ -300,13 +294,6 @@ static int nv_pre_reset(struct ata_link *link, unsigned long deadline)
return ata_std_prereset(link, deadline);
}
static void nv_error_handler(struct ata_port *ap)
{
ata_bmdma_drive_eh(ap, nv_pre_reset,
ata_std_softreset, NULL,
ata_std_postreset);
}
/**
* nv100_set_piomode - set initial PIO mode data
* @ap: ATA interface
@@ -358,7 +345,7 @@ static struct scsi_host_template amd_sht = {
static const struct ata_port_operations amd_base_port_ops = {
.inherits = &ata_bmdma_port_ops,
.error_handler = amd_error_handler,
.prereset = amd_pre_reset,
};
static struct ata_port_operations amd33_port_ops = {
@@ -393,7 +380,7 @@ static const struct ata_port_operations nv_base_port_ops = {
.inherits = &ata_bmdma_port_ops,
.cable_detect = ata_cable_ignore,
.mode_filter = nv_mode_filter,
.error_handler = nv_error_handler,
.prereset = nv_pre_reset,
.host_stop = nv_host_stop,
};
@@ -483,10 +470,10 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
.port_ops = &amd100_port_ops
}
};
struct ata_port_info pi;
const struct ata_port_info *ppi[] = { &pi, NULL };
const struct ata_port_info *ppi[] = { NULL, NULL };
static int printed_version;
int type = id->driver_data;
void *hpriv = NULL;
u8 fifo;
int rc;
@@ -511,7 +498,7 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
/*
* Okay, type is determined now. Apply type-specific workarounds.
*/
pi = info[type];
ppi[0] = &info[type];
if (type < 3)
ata_pci_clear_simplex(pdev);
@@ -530,11 +517,11 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
u32 udma;
pci_read_config_dword(pdev, 0x60, &udma);
pi.private_data = (void *)(unsigned long)udma;
hpriv = (void *)(unsigned long)udma;
}
/* And fire it up */
return ata_pci_init_one(pdev, ppi, &amd_sht);
return ata_pci_init_one(pdev, ppi, &amd_sht, hpriv);
}
#ifdef CONFIG_PM