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_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index 2c178c3..c774be9 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -458,8 +458,7 @@
.udma_mask = ATA_UDMA6,
.port_ops = &hpt3x2n_port_ops
};
- struct ata_port_info port = info;
- const struct ata_port_info *ppi[] = { &port, NULL };
+ const struct ata_port_info *ppi[] = { &info, NULL };
u8 irqmask;
u32 class_rev;
@@ -468,6 +467,7 @@
unsigned int f_low, f_high;
int adjust;
unsigned long iobase = pci_resource_start(dev, 4);
+ void *hpriv = NULL;
int rc;
rc = pcim_enable_device(dev);
@@ -554,9 +554,8 @@
pci_mhz);
/* Set our private data up. We only need a few flags so we use
it directly */
- port.private_data = NULL;
if (pci_mhz > 60) {
- port.private_data = (void *)PCI66;
+ hpriv = (void *)PCI66;
/*
* On HPT371N, if ATA clock is 66 MHz we must set bit 2 in
* the MISC. register to stretch the UltraDMA Tss timing.
@@ -567,7 +566,7 @@
}
/* Now kick off ATA set up */
- return ata_pci_init_one(dev, ppi, &hpt3x2n_sht);
+ return ata_pci_init_one(dev, ppi, &hpt3x2n_sht, hpriv);
}
static const struct pci_device_id hpt3x2n[] = {