From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Mon, 5 Nov 2007 10:10:11 +0000 (+0100)
Subject: [S390] Fix memory detection.
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=0b8da654b6c13b40b0e0efd916ee57ed13f9fa1f;p=linux-beck.git

[S390] Fix memory detection.

Yet another patch in the countless series of memory detection fixes:
if the last area of the reported storage size is a hole the detection
loop will loop forever.
Just break chunk detection loop if its end is going to be larger than
reported storage size.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index e6289ee74ecd..8bf4ae1150be 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -200,11 +200,13 @@ static noinline __init void find_memory_chunks(unsigned long memsize)
 		cc = __tprot(addr);
 		while (cc == old_cc) {
 			addr += CHUNK_INCR;
-			cc = __tprot(addr);
+			if (addr >= memsize)
+				break;
 #ifndef CONFIG_64BIT
 			if (addr == ADDR2G)
 				break;
 #endif
+			cc = __tprot(addr);
 		}
 
 		if (old_addr != addr &&