libata: stop overloading port_info->private_data
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>
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index e66bb85..f4092cb 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -442,8 +442,7 @@
.udma_mask = ATA_UDMA6, /* FIXME: should check north bridge */
.port_ops = &via_port_ops
};
- struct ata_port_info type;
- const struct ata_port_info *ppi[] = { &type, NULL };
+ const struct ata_port_info *ppi[] = { NULL, NULL };
struct pci_dev *isa = NULL;
const struct via_isa_bridge *config;
static int printed_version;
@@ -491,25 +490,25 @@
switch(config->flags & VIA_UDMA) {
case VIA_UDMA_NONE:
if (config->flags & VIA_NO_UNMASK)
- type = via_mwdma_info_borked;
+ ppi[0] = &via_mwdma_info_borked;
else
- type = via_mwdma_info;
+ ppi[0] = &via_mwdma_info;
break;
case VIA_UDMA_33:
- type = via_udma33_info;
+ ppi[0] = &via_udma33_info;
break;
case VIA_UDMA_66:
- type = via_udma66_info;
+ ppi[0] = &via_udma66_info;
/* The 66 MHz devices require we enable the clock */
pci_read_config_dword(pdev, 0x50, &timing);
timing |= 0x80008;
pci_write_config_dword(pdev, 0x50, timing);
break;
case VIA_UDMA_100:
- type = via_udma100_info;
+ ppi[0] = &via_udma100_info;
break;
case VIA_UDMA_133:
- type = via_udma133_info;
+ ppi[0] = &via_udma133_info;
break;
default:
WARN_ON(1);
@@ -524,9 +523,7 @@
}
/* We have established the device type, now fire it up */
- type.private_data = (void *)config;
-
- return ata_pci_init_one(pdev, ppi, &via_sht);
+ return ata_pci_init_one(pdev, ppi, &via_sht, (void *)config);
}
#ifdef CONFIG_PM