linux-kernel - [PATCH] block: partition-generic: Catch alloc_part

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Date:	Tue, 23 Jun 2015 08:41:02 +0800
From:	Axel Lin <axel.lin@...ics.com>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	Ming Lei <ming.lei@...onical.com>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] block: partition-generic: Catch alloc_part_info failure

Make add_partition() return proper ERR_PTR if alloc_part_info() fails.
This ensures the caller of add_partition() can catch the error by IS_ERROR
macro.

Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
 block/partition-generic.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block/partition-generic.c b/block/partition-generic.c
index 0d9e5f9..94de205 100644
--- a/block/partition-generic.c
+++ b/block/partition-generic.c
@@ -309,8 +309,10 @@ struct hd_struct *add_partition(struct gendisk *disk, int partno,
 
 	if (info) {
 		struct partition_meta_info *pinfo = alloc_part_info(disk);
-		if (!pinfo)
+		if (!pinfo) {
+			err = -ENOMEM;
 			goto out_free_stats;
+		}
 		memcpy(pinfo, info, sizeof(*info));
 		p->info = pinfo;
 	}
-- 
2.1.0



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