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authorPhilipp Hachtmann <phacht@linux.vnet.ibm.com>2014-01-23 15:53:10 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-23 16:36:51 -0800
commit87379ec8c2b8ae0acd526b87d2240afca92a7505 (patch)
treecd211d723a92cb4a8d7375e204d771665b60c11b
parentd6441637709ba302905f1076f2afcb6d4ea3a901 (diff)
downloadlinux-87379ec8c2b8ae0acd526b87d2240afca92a7505.tar.bz2
mm/nobootmem.c: add return value check in __alloc_memory_core_early()
When memblock_reserve() fails because memblock.reserved.regions cannot be resized, the caller (e.g. alloc_bootmem()) is not informed of the failed allocation. Therefore alloc_bootmem() silently returns the same pointer again and again. This patch adds a check for the return value of memblock_reserve() in __alloc_memory_core(). Signed-off-by: Philipp Hachtmann <phacht@linux.vnet.ibm.com> Reviewed-by: Tejun Heo <tj@kernel.org> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Tang Chen <tangchen@cn.fujitsu.com> Cc: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/nobootmem.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 19121ceb8874..bb1a70cc97a7 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -45,7 +45,9 @@ static void * __init __alloc_memory_core_early(int nid, u64 size, u64 align,
if (!addr)
return NULL;
- memblock_reserve(addr, size);
+ if (memblock_reserve(addr, size))
+ return NULL;
+
ptr = phys_to_virt(addr);
memset(ptr, 0, size);
/*