diff options
Diffstat (limited to 'drivers/ata')
| -rw-r--r-- | drivers/ata/libata-acpi.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index d14a48e75f1b..019d8ffdde50 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -34,6 +34,13 @@ struct taskfile_array { u8 tfa[REGS_PER_GTF]; /* regs. 0x1f1 - 0x1f7 */ }; +/* + * Helper - belongs in the PCI layer somewhere eventually + */ +static int is_pci_dev(struct device *dev) +{ + return (dev->bus == &pci_bus_type); +} /** * sata_get_dev_handle - finds acpi_handle and PCI device.function @@ -53,6 +60,9 @@ static int sata_get_dev_handle(struct device *dev, acpi_handle *handle, struct pci_dev *pci_dev; acpi_integer addr; + if (!is_pci_dev(dev)) + return -ENODEV; + pci_dev = to_pci_dev(dev); /* NOTE: PCI-specific */ /* Please refer to the ACPI spec for the syntax of _ADR. */ addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn); @@ -84,7 +94,12 @@ static int pata_get_dev_handle(struct device *dev, acpi_handle *handle, acpi_status status; struct acpi_device_info *dinfo = NULL; int ret = -ENODEV; - struct pci_dev *pdev = to_pci_dev(dev); + struct pci_dev *pdev; + + if (!is_pci_dev(dev)) + return -ENODEV; + + pdev = to_pci_dev(dev); bus = pdev->bus->number; devnum = PCI_SLOT(pdev->devfn); |