linux-kernel - [PATCH] mm/memblock: check memblock_reserve on fail in memblock_virt_alloc

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Message-Id: <1439663206-15484-1-git-send-email-kuleshovmail@gmail.com>
Date:	Sun, 16 Aug 2015 00:26:46 +0600
From:	Alexander Kuleshov <kuleshovmail@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Tony Luck <tony.luck@...el.com>, Pekka Enberg <penberg@...nel.org>,
	Mel Gorman <mgorman@...e.de>, Robin Holt <holt@....com>,
	Tang Chen <tangchen@...fujitsu.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Alexander Kuleshov <kuleshovmail@...il.com>
Subject: [PATCH] mm/memblock: check memblock_reserve on fail in memblock_virt_alloc_internal

This patch adds a check for memblock_reserve() call in the
memblock_virt_alloc_internal() function, because memblock_reserve()
can return -errno on fail.

Signed-off-by: Alexander Kuleshov <kuleshovmail@...il.com>
---
 mm/memblock.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/memblock.c b/mm/memblock.c
index 87108e7..73427546 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1298,7 +1298,9 @@ again:
 
 	return NULL;
 done:
-	memblock_reserve(alloc, size);
+	if (memblock_reserve(alloc, size))
+		return NULL;
+
 	ptr = phys_to_virt(alloc);
 	memset(ptr, 0, size);
 
-- 
2.5.0

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