Lars-Peter Clausen 92ab1aab59
regmap: Make regmap-mmio usable from atomic contexts ...
regmap-mmio uses a spinlock with spin_lock() and spin_unlock() for locking.
To be able to use the regmap API from different contexts (atomic vs non-atomic),
without the risk of race conditions, we need to use spin_lock_irqsave() and
spin_lock_irqrestore() instead. A new field, the spinlock_flags field, is added
to regmap struct to store the flags between regmap_{,un}lock_spinlock(). The
spinlock_flags field itself is also protected by the spinlock.
Thanks to Stephen Warren for the suggestion of this particular solution.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de >
Reviewed-by: Stephen Warren <swarren@nvidia.com >
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com >
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92ab1aab59