Commit a3252544 authored Feb 15, 2007 by Benjamin Herrenschmidt Committed by Paul Mackerras Feb 16, 2007

[POWERPC] Fix bug with early ioremap and 64k pages



The code for bolting hash entries for ioremap done before proper
mm initialization has a grown a bug when using 64K pages on a
machine where non-cacheable mappings are demoted to 4K HW pages.
The wrong page size index is being passed to the hash table mapping
functions causing a crash at boot on some pSeries machines using
bare metal linux.  This fixes it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

parent 41806ef4

arch/powerpc/mm/pgtable_64.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -103,7 +103,7 @@ static int map_io_page(unsigned long ea, unsigned long pa, int flags)
		*
		*/
		if (htab_bolt_mapping(ea, ea + PAGE_SIZE, pa, flags,
		mmu_virtual_psize)) {
		mmu_io_psize)) {
		printk(KERN_ERR "Failed to do bolted mapping IO "
		"memory at %016lx !\n", pa);
		return -ENOMEM;