Re: [PROBLEM] D-Link DFE-580TX: Only 3 Ports working

[Ivan Kokshaysky <ink@jurassic.park.msu.ru>]

On Mon, Nov 25, 2002 at 04:11:49PM +0100, Richard Mueller wrote:
> eth5: D-Link DFE-580TX 4 port Server Adapter at 0xbe00, 00:00:00:00:00:00, IRQ 20.
						    ^^^^
It's clear BIOS bug. All four controllers are sitting behind PCI-to-PCI
bridge which blocks IO access to the ranges 0xb100-0xb3ff, 0xb500-0xb7ff,
0xb900-0xbbff and 0xbd00-0xbfff due to PCI_BRIDGE_CTL_NO_ISA mode.

Does this patch help?

Ivan.

--- linux/arch/i386/kernel/pci-i386.c~	Thu Nov 21 20:34:54 2002
+++ linux/arch/i386/kernel/pci-i386.c	Mon Nov 25 20:04:38 2002
@@ -223,9 +223,19 @@ static void __init pcibios_allocate_reso
 				continue;
 			if (!r->start)		/* Address not assigned at all */
 				continue;
-			if (r->flags & IORESOURCE_IO)
+			if (r->flags & IORESOURCE_IO) {
 				disabled = !(command & PCI_COMMAND_IO);
-			else
+				if ((r->start & 0x300) && r->start > 0x400) {
+					printk(KERN_ERR "PCI: bad alignment "
+					       "of IO region %d [%04lx] of "
+					       "device %s\n",
+						idx, r->start, dev->slot_name);
+					/* We'll assign a new address later */
+					r->end -= r->start;
+					r->start = 0;
+					continue;
+				}
+			} else
 				disabled = !(command & PCI_COMMAND_MEMORY);
 			if (pass == disabled) {
 				DBG("PCI: Resource %08lx-%08lx (f=%lx, d=%d, p=%d)\n",