# \[PATCH 6/8\] ppc/pnv: fix overrunning segment tracing array - From: Gavin Shan \ - Date: 2012-08-20 13:49:36 - List: linuxppc-dev - Page: https://ratatoskr.run/linuxppc-dev/2012/08/9470855 - Thread: https://ratatoskr.run/linuxppc-dev/2012/08/9470856/t.md ```text 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 Reviewed-by: Ram Pai Reviewed-by: Richard Yang --- arch/powerpc/platforms/powernv/pci-ioda.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index adaef11..c856f90 100644 --- 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); -- 1.7.5.4 ```