gpio: pcf857x: Check for irq_set_irq_wake() failures
authorGeert Uytterhoeven <geert+renesas@glider.be>
Tue, 26 May 2015 11:34:02 +0000 (13:34 +0200)
committerLinus Walleij <linus.walleij@linaro.org>
Mon, 1 Jun 2015 14:55:25 +0000 (16:55 +0200)
commitffb8e44bd7617ede81d526d33d13d96a2c6a6e20
tree08dceb61e75f5e0b3715d8fa93de8583b268afcd
parent08b085a07efe12568d86dff064e6f089e2971744
gpio: pcf857x: Check for irq_set_irq_wake() failures

If an interrupt controller doesn't support wake-up configuration,
irq_set_irq_wake() returns an error code.  Then any subsequent call
trying to deconfigure wake-up will cause an imbalance, and a warning
will be printed:

    WARNING: CPU: 1 PID: 1341 at kernel/irq/manage.c:540 irq_set_irq_wake+0x
    Unbalanced IRQ 26 wake disable

To fix this, refrain from any further parent interrupt controller
(de)configuration if irq_set_irq_wake() failed.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
drivers/gpio/gpio-pcf857x.c