linux-kernel - [PATCH 2/2] UBI: rename_volumes: Use UBI

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Message-Id: <1414594338-14695-2-git-send-email-richard@nod.at>
Date:	Wed, 29 Oct 2014 15:52:18 +0100
From:	Richard Weinberger <richard@....at>
To:	dedekind1@...il.com
Cc:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Richard Weinberger <richard@....at>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Andrew Murray <amurray@...edded-bits.co.uk>
Subject: [PATCH 2/2] UBI: rename_volumes: Use UBI_METAONLY

By using UBI_METAONLY in rename_volumes() it is now possible to rename
an UBI volume atomically while it is mounted.
This is useful for firmware upgrades.

Cc: Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
Cc: Andrew Murray <amurray@...edded-bits.co.uk>
Signed-off-by: Richard Weinberger <richard@....at>
---
 drivers/mtd/ubi/cdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mtd/ubi/cdev.c b/drivers/mtd/ubi/cdev.c
index 5f01edd..fcdf7b9 100644
--- a/drivers/mtd/ubi/cdev.c
+++ b/drivers/mtd/ubi/cdev.c
@@ -735,7 +735,7 @@ static int rename_volumes(struct ubi_device *ubi,
 			goto out_free;
 		}
 
-		re->desc = ubi_open_volume(ubi->ubi_num, vol_id, UBI_READWRITE);
+		re->desc = ubi_open_volume(ubi->ubi_num, vol_id, UBI_METAONLY);
 		if (IS_ERR(re->desc)) {
 			err = PTR_ERR(re->desc);
 			ubi_err("cannot open volume %d, error %d", vol_id, err);
-- 
1.8.4.5

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