UBI: fix race condition

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This patch fixes a minor problem where we may fail to wake
upe the UBI background thread. This is not fatal at all,
it may just result at sligtly worse performace for a short
period of time, just because the thread will be woken up
when real I/O on the UBI starts.

Anywey, the issue is the race condition between
'ubi_attach_mtd_dev()' and 'ubi_thread()'. If we do not
serialize them, the 'wake_up_process()' call may be done
before 'ubi_thread()' went seep, but after it checked
'ubi->thread_enabled'.

This issue was spotted by Shin Hong <hongshin@gmail.com>

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

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This commit is contained in:

Artem Bityutskiy 2009-05-23 13:44:09 +03:00

parent 95c9c1da79

commit ddbd3b6170

1 changed files with 7 additions and 1 deletions

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8

drivers/mtd/ubi/build.c

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