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authorPaul Mundt2010-02-25 16:37:46 +0900
committerPaul Mundt2010-02-25 16:37:46 +0900
commitda64c2a8dee66ca03f4f3e15d84be7bedf73db3d (patch)
tree8de9d4de358447a80f731a49a689c84bca42abf5 /Documentation/pcmcia
parent29463c28a553e1959ec45cc8ad9d2eb434663cdf (diff)
clocksource: Fix up a registration/IRQ race in the sh drivers.
All of the SH clocksource drivers follow the scheme that the IRQ is setup prior to registering the clockevent. The interrupt handler in the clockevent cases looks to the event handler function pointer being filled in by the registration code, permitting us to get in to situations where asserted IRQs step in to the handler before registration has had a chance to complete and hitting a NULL pointer deref. In practice this is not an issue for most platforms, but some of them with fairly special loaders (or that are chain-loading from another kernel) may enter in to this situation. This fixes up the oops reported by Rafael on hp6xx. Reported-and-tested-by: Rafael Ignacio Zurita <rafaelignacio.zurita@gmail.com> Cc: stable@kernel.org Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'Documentation/pcmcia')
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