[PATCH -next v3] ubi: Fix failure attaching when vid_hdr offset equals to (sub)page size
chengzhihao1 at huawei.com
Fri Mar 24 18:02:40 PDT 2023
>> Following process will make ubi attaching failed since commit
>> 1b42b1a36fc946 ("ubi: ensure that VID header offset ... size"):
>> ID="0xec,0xa1,0x00,0x15" # 128M 128KB 2KB
>> modprobe nandsim id_bytes=$ID
>> flash_eraseall /dev/mtd0
>> modprobe ubi mtd="0,2048" # set vid_hdr offset as 2048 (one page)
>> ubi0 error: ubi_attach_mtd_dev [ubi]: VID header offset 2048 too large.
>> UBI error: cannot attach mtd0
>> UBI error: cannot initialize UBI, error -22
>> Rework original solution, the key point is making sure
>> 'vid_hdr_shift + UBI_VID_HDR_SIZE < ubi->vid_hdr_alsize',
>> so we should check vid_hdr_shift rather not vid_hdr_offset.
>> Then, ubi still support (sub)page aligined VID header offset.
>> Fixes: 1b42b1a36fc946 ("ubi: ensure that VID header offset ... size")
>> Signed-off-by: Zhihao Cheng <chengzhihao1 at huawei.com>
>> v2->v3: Use printing format '%zu' for UBI_VID_HDR_SIZE.
>> drivers/mtd/ubi/build.c | 21 +++++++++++++++------
>> 1 file changed, 15 insertions(+), 6 deletions(-)
> Having had the problem, and found this patch as a fix, feel free to
> add my:
Thanks for testing.
> Tested-by: Nicolas Schichan <nschichan at freebox.fr>
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