Patch "powerpc/powernv: Don't map M64 segments using M32DT" has been added to the 4.0-stable tree

Patch "powerpc/powernv: Don't map M64 segments using M32DT" has been added to the 4.0-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    powerpc/powernv: Don't map M64 segments using M32DT

to the 4.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     powerpc-powernv-don-t-map-m64-segments-using-m32dt.patch
and it can be found in the queue-4.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 027fa02f84e851e21daffdf8900d6117071890f8 Mon Sep 17 00:00:00 2001
From: Gavin Shan <gwshan@linux.vnet.ibm.com>
Date: Fri, 27 Mar 2015 11:29:00 +1100
Subject: powerpc/powernv: Don't map M64 segments using M32DT

From: Gavin Shan <gwshan@linux.vnet.ibm.com>

commit 027fa02f84e851e21daffdf8900d6117071890f8 upstream.

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.

Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/powerpc/platforms/powernv/pci-ioda.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1777,7 +1777,8 @@ static void pnv_ioda_setup_pe_seg(struct
 				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;


Patches currently in stable-queue which might be from gwshan@linux.vnet.ibm.com are

queue-4.0/powerpc-powernv-don-t-map-m64-segments-using-m32dt.patch