[PATCH] PPC64 remove unnecessary ISA ioports

[Paul Mackerras]

During boot, pSeries_request_regions() should only request I/O ports for
legacy ISA in the case that ISA exists on the system.  Add a check for
this.  This patch was suggested by Anton.

Signed-off-by: John Rose <johnrose@xxxxxxxxxxxxxx>
Signed-off-by: Paul Mackerras <paulus@xxxxxxxxx>

diff -puN arch/ppc64/kernel/pSeries_pci.c~02_ppc64_request_regions arch/ppc64/kernel/pSeries_pci.c
--- 2_6_linus_4/arch/ppc64/kernel/pSeries_pci.c~02_ppc64_request_regions	2005-03-14 15:59:44.000000000 -0600
+++ 2_6_linus_4-johnrose/arch/ppc64/kernel/pSeries_pci.c	2005-03-14 15:59:44.000000000 -0600
@@ -540,6 +540,9 @@ EXPORT_SYMBOL(pcibios_remove_root_bus);
 
 static void __init pSeries_request_regions(void)
 {
+	if (!isa_io_base)
+		return;
+
 	request_region(0x20,0x20,"pic1");
 	request_region(0xa0,0x20,"pic2");
 	request_region(0x00,0x20,"dma1");
-
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