Re: ATA-UP lock and load, all night long.......

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On Mon, 29 May 2000, Andre Hedrick wrote:

> Nope, PIIX3 SuperMicro P6DNF PPro 200's w/ 512k.

 Hmm, given it happens in the noapic mode, too, there is only one possible
reason I can think of -- the device keeps its IRQ line asserted past
hw_interrupt_type.end(). Any chance the IRQ gets allocated to PIRQD# of
PIIX3? The PIIX3 hardwires it's USB interrupt to this line (and they call
PCI software-reconfigurable...) and I see you have no UHCI driver loaded
so there is no driver to handle it. Check if the following patch fixes
your problems.

 Additionally there are MP-tables which are silent of this USB interrupt,
which doesn't make things easier (my board is an example, sigh...).

  Maciej

-- 
+  Maciej W. Rozycki, Technical University of Gdansk, Poland   +
+--------------------------------------------------------------+
+        e-mail: macro@ds2.pg.gda.pl, PGP key available        +
diff -u --recursive --new-file linux-2.3.99-pre8.macro/drivers/pci/quirks.c linux-2.3.99-pre8/drivers/pci/quirks.c
--- linux-2.3.99-pre8.macro/drivers/pci/quirks.c	Sat May 13 04:27:43 2000
+++ linux-2.3.99-pre8/drivers/pci/quirks.c	Tue May 30 15:04:42 2000
@@ -181,6 +181,26 @@
 }
 
 /*
+ * PIIX3 USB: We have to disable USB interrupts that are
+ * hardwired to PIRQD# and may be shared with an
+ * external device.
+ *
+ * Legacy Support Register (LEGSUP):
+ *	bit13:	USB PIRQ Enable (USBPIRQDEN),
+ *	bit4:	Trap/SMI ON IRQ Enable (USBSMIEN).
+ *
+ * We mask out all r/wc bits, too.
+ */
+static void __init quirk_piix3usb(struct pci_dev *dev)
+{
+	u16 legsup;
+
+	pci_read_config_word(dev, 0xc0, &legsup);
+	legsup &= 0x50ef;
+	pci_write_config_word(dev, 0xc0, legsup);
+}
+
+/*
  *  The main table of quirks.
  */
 
@@ -213,6 +233,7 @@
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_VIA,	PCI_DEVICE_ID_VIA_82C686_4,	quirk_via_acpi },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_INTEL,	PCI_DEVICE_ID_INTEL_82371AB_3,	quirk_piix4acpi },
 	{ PCI_FIXUP_FINAL,	PCI_VENDOR_ID_AL,	PCI_DEVICE_ID_AL_M7101,		quirk_ali7101 },
+	{ PCI_FIXUP_FINAL,      PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_82371SB_2,  quirk_piix3usb },
 	{ 0 }
 };
 
-
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• Next message: Thomas Jacob: "[PATCH] bttv, kernel 2.2.15"
• Previous message: Alan Cox: "Re: es1371 broken in 2.4.0-test1-ac4 (and earlier, maybe)"
• In reply to: Andre Hedrick: "Re: ATA-UP lock and load, all night long......."
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