lkml.org 
[lkml]   [2016]   [Dec]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V2 2/2] mm/memblock.c: check return value of memblock_reserve() in memblock_virt_alloc_internal()
Date
memblock_reserve() may fail in case there is not enough regions.

This patch checks the return value.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
---
mm/memblock.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/mm/memblock.c b/mm/memblock.c
index cd85303..93fa687 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1274,18 +1274,17 @@ static void * __init memblock_virt_alloc_internal(

if (max_addr > memblock.current_limit)
max_addr = memblock.current_limit;
-
again:
alloc = memblock_find_in_range_node(size, align, min_addr, max_addr,
nid, flags);
- if (alloc)
+ if (alloc && !memblock_reserve(alloc, size))
goto done;

if (nid != NUMA_NO_NODE) {
alloc = memblock_find_in_range_node(size, align, min_addr,
max_addr, NUMA_NO_NODE,
flags);
- if (alloc)
+ if (alloc && !memblock_reserve(alloc, size))
goto done;
}

@@ -1303,7 +1302,6 @@ static void * __init memblock_virt_alloc_internal(

return NULL;
done:
- memblock_reserve(alloc, size);
ptr = phys_to_virt(alloc);
memset(ptr, 0, size);

--
2.5.0
\
 
 \ /
  Last update: 2016-12-18 15:49    [W:0.080 / U:2.124 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site