On Wed, May 29, 2013 at 10:46:42AM +0200, Sebastian Andrzej Siewior wrote: > Without this, devm_regmap_init_mmio() creates & uses a simple > spin_lock() and this should be enough. Within the probe function the > registers are read and written in process context. Later they are > accessed from the ISR and lockdep complains because now the lock is > taken suddenly with IRQs enabled. Currently I don't see any other way to > keep lockdep quiet than doing this.
This is not a good place to make this change, there's nothing specific to the device here and in actual fact there's already a change in the works from Lars-Peter Clausen converting the spinlock to always use spin_lock_irqsave() so it should be resolved soon. The thread was on lkml in the past few days.
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