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[GFS2] Fix calculation of demote state 

If a glock is in the exclusive state and a request for demote to
deferred has been received, then further requests for demote to
shared are being ignored. This patch fixes that by ensuring that
we demote to unlocked in that case.

Signed-off-by: Josef Whiter <jwhiter@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Josef Whiter 2007-07-23 10:02:40 +01:00 committed by Steven Whitehouse
parent 87124e581b
commit 26caee5bc6
1 changed files with 3 additions and 2 deletions
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5
fs/gfs2/glock.c
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@ -697,8 +697,9 @@ static void handle_callback(struct gfs2_glock *gl, unsigned int state, int remot
}
return;
}
} else if (gl->gl_demote_state != LM_ST_UNLOCKED) {
gl->gl_demote_state = state;
} else if (gl->gl_demote_state != LM_ST_UNLOCKED &&
gl->gl_demote_state != state) {
gl->gl_demote_state = LM_ST_UNLOCKED;
}
spin_unlock(&gl->gl_spin);
}