commit: abb3e01103eb4e2ea5c15e6fedbc74e08bd4cc2b
From: Artem Bityutskiy <[email protected]>
Date: Sat, 18 Aug 2012 14:11:42 +0200
Subject: UBI: fix autoresize handling in R/O mode
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Currently UBI fails in autoresize when it is in R/O mode (e.g., because the
underlying MTD device is R/O). This patch fixes the issue - we just skip
autoresize and print a warning.

Reported-by: Pali Rohár <[email protected]>
Cc: [email protected]
Signed-off-by: Artem Bityutskiy <[email protected]>
---
 drivers/mtd/ubi/build.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 355756b..8966088 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -799,6 +799,11 @@ static int autoresize(struct ubi_device *ubi, int vol_id)
        struct ubi_volume *vol = ubi->volumes[vol_id];
        int err, old_reserved_pebs = vol->reserved_pebs;
 
+       if (ubi->ro_mode) {
+               ubi_warn("skip auto-resize because of R/O mode");
+               return 0;
+       }
+
        /*
         * Clear the auto-resize flag in the volume in-memory copy of the
         * volume table, and 'ubi_resize_volume()' will propagate this change
-- 
1.7.3.4
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