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[libata] minor PCI IDE probe fixes and cleanups

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* Replace needless 'n_ports > 2' check with a simple BUG_ON().
  No existing driver ever wants more than 2 ports.

* Delete ATA_FLAG_NO_LEGACY check.  No current driver uses
  ata_pci_init_one(), that sets this flag.

* Move PCI_CLASS_PROG register read below pci_enable_device()

* Handle ata_device_add() failure

Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Jeff Garzik 2006-09-28 03:40:11 -04:00
parent 54bb3a94b1
commit c791c30670
1 changed files with 20 additions and 20 deletions
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40
drivers/ata/libata-sff.c
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@ -946,35 +946,21 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
{
struct ata_probe_ent *probe_ent = NULL;
struct ata_port_info *port[2];
u8 tmp8, mask;
u8 mask;
unsigned int legacy_mode = 0;
int disable_dev_on_err = 1;
int rc;
DPRINTK("ENTER\n");
BUG_ON(n_ports < 1 || n_ports > 2);
port[0] = port_info[0];
if (n_ports > 1)
port[1] = port_info[1];
else
port[1] = port[0];
if ((port[0]->flags & ATA_FLAG_NO_LEGACY) == 0
&& (pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
/* TODO: What if one channel is in native mode ... */
pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
mask = (1 << 2) | (1 << 0);
if ((tmp8 & mask) != mask)
legacy_mode = (1 << 3);
}
/* FIXME... */
if ((!legacy_mode) && (n_ports > 2)) {
printk(KERN_ERR "ata: BUG: native mode, n_ports > 2\n");
n_ports = 2;
/* For now */
}
/* FIXME: Really for ATA it isn't safe because the device may be
multi-purpose and we want to leave it alone if it was already
enabled. Secondly for shared use as Arjan says we want refcounting
@ -987,6 +973,16 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
if (rc)
return rc;
if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
u8 tmp8;
/* TODO: What if one channel is in native mode ... */
pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
mask = (1 << 2) | (1 << 0);
if ((tmp8 & mask) != mask)
legacy_mode = (1 << 3);
}
rc = pci_request_regions(pdev, DRV_NAME);
if (rc) {
disable_dev_on_err = 0;
@ -1039,7 +1035,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
goto err_out_regions;
}
/* FIXME: If we get no DMA mask we should fall back to PIO */
/* TODO: If we get no DMA mask we should fall back to PIO */
rc = pci_set_dma_mask(pdev, ATA_DMA_MASK);
if (rc)
goto err_out_regions;
@ -1062,13 +1058,17 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
pci_set_master(pdev);
/* FIXME: check ata_device_add return */
ata_device_add(probe_ent);
if (!ata_device_add(probe_ent)) {
rc = -ENODEV;
goto err_out_ent;
}
kfree(probe_ent);
return 0;
err_out_ent:
kfree(probe_ent);
err_out_regions:
if (legacy_mode & ATA_PORT_PRIMARY)
release_region(ATA_PRIMARY_CMD, 8);