linux-kernel - [PATCH 3.16 140/410] mtd: ubi: wl: Fix error return code in ubi_wl

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Message-ID: <lsq.1528380321.327600273@decadent.org.uk>
Date:   Thu, 07 Jun 2018 15:05:21 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "Wei Yongjun" <weiyongjun1@...wei.com>,
        "Richard Weinberger" <richard@....at>,
        "Boris Brezillon" <boris.brezillon@...e-electrons.com>
Subject: [PATCH 3.16 140/410] mtd: ubi: wl: Fix error return code in
 ubi_wl_init()

3.16.57-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Yongjun <weiyongjun1@...wei.com>

commit 7233982ade15eeac05c6f351e8d347406e6bcd2f upstream.

Fix to return error code -ENOMEM from the kmem_cache_alloc() error
handling case instead of 0, as done elsewhere in this function.

Fixes: f78e5623f45b ("ubi: fastmap: Erase outdated anchor PEBs during
attach")
Signed-off-by: Wei Yongjun <weiyongjun1@...wei.com>
Reviewed-by: Boris Brezillon <boris.brezillon@...e-electrons.com>
Signed-off-by: Richard Weinberger <richard@....at>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/mtd/ubi/wl.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

--- a/drivers/mtd/ubi/wl.c
+++ b/drivers/mtd/ubi/wl.c
@@ -1925,8 +1925,10 @@ int ubi_wl_init(struct ubi_device *ubi,
 		cond_resched();
 
 		e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
-		if (!e)
+		if (!e) {
+			err = -ENOMEM;
 			goto out_free;
+		}
 
 		e->pnum = aeb->pnum;
 		e->ec = aeb->ec;
@@ -1966,8 +1968,10 @@ int ubi_wl_init(struct ubi_device *ubi,
 			cond_resched();
 
 			e = kmem_cache_alloc(ubi_wl_entry_slab, GFP_KERNEL);
-			if (!e)
+			if (!e) {
+				err = -ENOMEM;
 				goto out_free;
+			}
 
 			e->pnum = aeb->pnum;
 			e->ec = aeb->ec;