On Thu, Dec 26, 2002 at 08:48:55PM -0500, Jason Papadopoulos wrote:
> Turning off module support lets the 2.5.53 kernel compile on an Alpha, but
> when booting on a DS10 the kernel claims that the argument to "root=" is
> invalid, fails to mount the root filesystem, and panics.
>
> The 2.2 and 2.4 kernels all worked fine with "root=/dev/hda3". The machine
> has a single IDE drive; /boot is mounted on hda1, /tmp on hda2, and / on hda3.
> The gzipped vmlinux and System.map are both in /boot.
The 2.5 is known to have problems with certain IDE chipsets.
Please try appended patch.
Ivan.
--- 2.5.53/drivers/pci/quirks.c Tue Dec 24 16:13:22 2002
+++ linux/drivers/pci/quirks.c Fri Dec 27 14:17:43 2002
@@ -536,6 +536,48 @@ static void __init quirk_mediagx_master(
}
/*
+ * As per PCI spec, ignore base address registers 0-3 of the IDE controllers
+ * running in Compatible mode (bits 0 and 2 in the ProgIf for primary and
+ * secondary channels respectively). If the device reports Compatible mode
+ * but does use BAR0-3 for address decoding, we assume that firmware has
+ * programmed these BARs with standard values (0x1f0,0x3f4 and 0x170,0x374).
+ * Exceptions (if they exist) must be handled in chip/architecture specific
+ * fixups.
+ */
+static void __devinit
+quirk_ide_bases(struct pci_dev *dev)
+{
+ struct resource *res;
+ int first_bar = 2, last_bar = 0;
+
+ if ((dev->class >> 8) != PCI_CLASS_STORAGE_IDE)
+ return;
+
+ res = &dev->resource[0];
+
+ /* primary channel: ProgIf bit 0, BAR0, BAR1 */
+ if (!(dev->class & 1) && (res[0].flags || res[1].flags)) {
+ res[0].start = res[0].end = res[0].flags = 0;
+ res[1].start = res[1].end = res[1].flags = 0;
+ first_bar = 0;
+ last_bar = 1;
+ }
+
+ /* secondary channel: ProgIf bit 2, BAR2, BAR3 */
+ if (!(dev->class & 4) && (res[2].flags || res[3].flags)) {
+ res[2].start = res[2].end = res[2].flags = 0;
+ res[3].start = res[3].end = res[3].flags = 0;
+ last_bar = 3;
+ }
+
+ if (!last_bar)
+ return;
+
+ printk(KERN_INFO "PCI: Ignoring BAR%d-%d of IDE controller %s\n",
+ first_bar, last_bar, dev->slot_name);
+}
+
+/*
* The main table of quirks.
*/
@@ -577,6 +619,7 @@ static struct pci_fixup pci_fixups[] __d
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_AL, PCI_DEVICE_ID_AL_M7101, quirk_ali7101_acpi },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371SB_2, quirk_piix3_usb },
{ PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_2, quirk_piix3_usb },
+ { PCI_FIXUP_HEADER, PCI_ANY_ID, PCI_ANY_ID, quirk_ide_bases },
{ PCI_FIXUP_FINAL, PCI_ANY_ID, PCI_ANY_ID, quirk_cardbus_legacy },
#ifdef CONFIG_X86_IO_APIC
-
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This archive was generated by hypermail 2b29 : Tue Dec 31 2002 - 22:00:10 EST