tree 2cb9598c3f09a473df3b4bfc6290e4575b4fcdab
parent d829b8fb2431595422289cfc210f0a955a8bec74
author Jeffy Chen <jeffy.chen@rock-chips.com> 1498476814 +0800
committer Thomas Gleixner <tglx@linutronix.de> 1498484820 +0200

genirq: Avoid unnecessary low level irq function calls

Check irq state in enable/disable/unmask/mask_irq to avoid unnecessary
low level irq function calls.

This has two advantages:
    - Conditionals are faster than hardware access

    - Solves issues with the underlying refcounting of the pinctrl
      infrastructure

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: tfiga@chromium.org
Cc: briannorris@chromium.org
Cc: dianders@chromium.org
Link: http://lkml.kernel.org/r/1498476814-12563-2-git-send-email-jeffy.chen@rock-chips.com