Messages in this thread Patch in this message | | | Subject | [PATCH] libata-sff: Allow for wacky systems | From | Alan Cox <> | Date | Mon, 16 Oct 2006 16:24:50 +0100 |
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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>
diff -u --new-file --recursive --exclude-from /usr/src/exclude linux.vanilla-2.6.19-rc1-mm1/drivers/ata/libata-sff.c linux-2.6.19-rc1-mm1/drivers/ata/libata-sff.c --- linux.vanilla-2.6.19-rc1-mm1/drivers/ata/libata-sff.c 2006-10-13 15:09:23.000000000 +0100 +++ linux-2.6.19-rc1-mm1/drivers/ata/libata-sff.c 2006-10-13 17:15:57.000000000 +0100 @@ -981,6 +981,15 @@ 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); - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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