linux-kernel - [PATCH] mm/memory_hotplug.c: Fix return value of online

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Date:	Wed,  3 Jul 2013 17:29:59 -0600
From:	Toshi Kani <toshi.kani@...com>
To:	akpm@...ux-foundation.org
Cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	isimatu.yasuaki@...fujitsu.com, tangchen@...fujitsu.com,
	Toshi Kani <toshi.kani@...com>
Subject: [PATCH] mm/memory_hotplug.c: Fix return value of online_pages()

online_pages() is called from memory_block_action() when a user
requests to online a memory block via sysfs.  This function needs
to return a proper error value in case of error.

Signed-off-by: Toshi Kani <toshi.kani@...com>
---
 mm/memory_hotplug.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index cd2990f..ca1dd3a 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -914,19 +914,19 @@ int __ref online_pages(unsigned long pfn, unsigned long nr_pages, int online_typ
 	if ((zone_idx(zone) > ZONE_NORMAL || online_type == ONLINE_MOVABLE) &&
 	    !can_online_high_movable(zone)) {
 		unlock_memory_hotplug();
-		return -1;
+		return -EINVAL;
 	}
 
 	if (online_type == ONLINE_KERNEL && zone_idx(zone) == ZONE_MOVABLE) {
 		if (move_pfn_range_left(zone - 1, zone, pfn, pfn + nr_pages)) {
 			unlock_memory_hotplug();
-			return -1;
+			return -EINVAL;
 		}
 	}
 	if (online_type == ONLINE_MOVABLE && zone_idx(zone) == ZONE_MOVABLE - 1) {
 		if (move_pfn_range_right(zone, zone + 1, pfn, pfn + nr_pages)) {
 			unlock_memory_hotplug();
-			return -1;
+			return -EINVAL;
 		}
 	}
 
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