gpio: Langwell GPIO driver bugfixes
- Remove wrong and unnecessary unmask operation - Remove extra GEDR reading This fixes the loss of interrupts which occurs when two or more pins are triggered in close succession. Signed-off-by: NAlek Du <alek.du@intel.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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