queue/pseries-Fix-64-bit-logical-memory-block-panic.patch

From 89c140bbaeee7a55ed0360a88f294ead2b95201b Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@ozlabs.org>
Date: Wed, 15 Jul 2020 10:08:20 +1000
Subject: [PATCH] pseries: Fix 64 bit logical memory block panic

commit 89c140bbaeee7a55ed0360a88f294ead2b95201b upstream.

Booting with a 4GB LMB size causes us to panic:

  qemu-system-ppc64: OS terminated: OS panic:
      Memory block size not suitable: 0x0

Fix pseries_memory_block_size() to handle 64 bit LMBs.

Cc: stable@vger.kernel.org
Signed-off-by: Anton Blanchard <anton@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200715000820.1255764-1-anton@ozlabs.org

diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index 73a5dcd977e1..5d545b78111f 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -25,7 +25,7 @@
 unsigned long pseries_memory_block_size(void)
 {
 	struct device_node *np;
-	unsigned int memblock_size = MIN_MEMORY_BLOCK_SIZE;
+	u64 memblock_size = MIN_MEMORY_BLOCK_SIZE;
 	struct resource r;
 
 	np = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
-- 
2.27.0