diff options
| author |   Alan Cox <alan@lxorguk.ukuu.org.uk> | 2006-10-16 16:24:50 +0100 |
|---|---|---|
| committer |   Jeff Garzik <jeff@garzik.org> | 2006-10-21 15:18:59 -0400 |
| commit | 8eb166bf805cc1c1d38d57211e8737631376b9ba (patch) | |
| tree | d24a11802b064f0629ea2501a6e2ae360abf2e1d | |
| parent | [PATCH] ahci: readability tweak (diff) | |
| download | linux-dev-8eb166bf805cc1c1d38d57211e8737631376b9ba.tar.xz linux-dev-8eb166bf805cc1c1d38d57211e8737631376b9ba.zip | |
[PATCH] libata-sff: Allow for wacky systems
There are some Linux supported platforms that simply cannot hit the low
I/O addresses used by ATA legacy mode PCI mappings. These platforms have
a window for PCI space that is fixed by the board logic and doesn't
include the neccessary locations.
Provide a config option so that such platforms faced with a controller
that they cannot support simply error it and punt
Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
| -rw-r--r-- | drivers/ata/libata-sff.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c index 06daaa3736a2..7645f2b30ccf 100644 --- a/drivers/ata/libata-sff.c +++ b/drivers/ata/libata-sff.c @@ -981,6 +981,15 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info, mask = (1 << 2) | (1 << 0); if ((tmp8 & mask) != mask) legacy_mode = (1 << 3); +#if defined(CONFIG_NO_ATA_LEGACY) + /* Some platforms with PCI limits cannot address compat + port space. In that case we punt if their firmware has + left a device in compatibility mode */ + if (legacy_mode) { + printk(KERN_ERR "ata: Compatibility mode ATA is not supported on this platform, skipping.\n"); + return -EOPNOTSUPP; + } +#endif } rc = pci_request_regions(pdev, DRV_NAME); |