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由 Thomas Gleixner 提交于
generic_handle_irq() is missing a NULL pointer check for the result of irq_to_desc. This was a not a big problem, but we want to expose it to drivers, so we better have sanity checks in place. Add a return value as well, which indicates that the irq number was valid and the handler was invoked. Based on the pure code move from Jonathan Cameron. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Jonathan Cameron <jic23@cam.ac.uk>
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