• Paul Mundt's avatar
    Revert "clocksource: sh_tmu: Runtime PM support" · d4905ce3
    Paul Mundt authored
    This reverts commit 1b842e91.
    
    There is a fundamental ordering race between the early and late probe
    paths and the runtime PM tie-in that results in __pm_runtime_resume()
    attempting to take a lock that hasn't been initialized yet (which by
    proxy also suggests that pm_runtime_init() hasn't yet been run on the
    device either, making the entire thing unsafe) -- resulting in instant
    death on SMP or on UP with spinlock debugging enabled:
    
    	 sh_tmu.0: used for clock events
    	 sh_tmu.0: used for periodic clock events
    	BUG: spinlock trylock failure on UP on CPU#0, swapper/0
    	 lock: 804db198, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
    	...
    
    Revert it for now until the ordering issues can be resolved, or we can get
    some more help from the runtime PM framework to make this possible.
    Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
    d4905ce3
sh_tmu.c 10.6 KB