From: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
[ Upstream commit 027fa02f84e851e21daffdf8900d6117071890f8 ]
If M64 has been supported, the prefetchable 64-bits memory resources
shouldn't be mapped to the corresponding PE# via M32DT. Unfortunately,
we're doing that in pnv_ioda_setup_pe_seg() wrongly. The issue was
introduced by commit 262af55 ("powerpc/powernv: Enable M64 aperatus
for PHB3"). The patch fixes the issue by simply skipping M64 resources
when updating to M32DT.
Cc: <stable@xxxxxxxxxxxxxxx> # v3.17+
Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
arch/powerpc/platforms/powernv/pci-ioda.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 3f59670..86a7256 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1645,7 +1645,8 @@ static void pnv_ioda_setup_pe_seg(struct pci_controller *hose,
region.start += phb->ioda.io_segsize;
index++;
}
- } else if (res->flags & IORESOURCE_MEM) {
+ } else if ((res->flags & IORESOURCE_MEM) &&
+ !pnv_pci_is_mem_pref_64(res->flags)) {
region.start = res->start -
hose->mem_offset[0] -
phb->ioda.m32_pci_base;
--
2.1.0
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