powerpc/powernv: Fix overrunning segment tracing array

There're 2 arrays introduced to trace which PE has occupied the
corresponding resource (I/O or MMIO) segment. However, we didn't
allocate enough memory for them and that possiblly leads to PE
descriptor corruption.

The patch fixes that by allocating enough memory for those 2 arrays.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Reviewed-by: Ram Pai <linuxram@us.ibm.com>
Reviewed-by: Richard Yang <weiyang@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index c4461ad..40559bf 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1411,9 +1411,9 @@ void __init pnv_pci_init_ioda1_phb(struct device_node *np)
        /* Allocate aux data & arrays */
        size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long));
        m32map_off = size;
-       size += phb->ioda.total_pe;
+       size += phb->ioda.total_pe * sizeof(phb->ioda.m32_segmap[0]);
        iomap_off = size;
-       size += phb->ioda.total_pe;
+       size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]);
        pemap_off = size;
        size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe);
        aux = alloc_bootmem(size);