Commit 04badfd2 authored Oct 13, 2008 by Nathan Fontenot Committed by Benjamin Herrenschmidt Oct 21, 2008

powerpc/pseries: Validate PFN in pseries_remove_lmb()



The pfn of the memory to be removed should be validated prior to
attempting to remove the memory.  In cases where the probe of a
memory section fails during hotplug add, the pfn for the lmb may
not be valid.

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent c10c178a

arch/powerpc/platforms/pseries/hotplug-memory.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -22,6 +22,12 @@ static int pseries_remove_lmb(unsigned long base, unsigned int lmb_size)
		int ret;

		start_pfn = base >> PAGE_SHIFT;

		if (!pfn_valid(start_pfn)) {
		lmb_remove(base, lmb_size);
		return 0;
		}

		zone = page_zone(pfn_to_page(start_pfn));

		/*