diff options
| author |   Thomas Gleixner <tglx@linutronix.de> | 2017-05-31 11:58:32 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-06-04 14:35:13 +0200 |
| commit | 201d7f47f34bd7cb19161d0426f13b141e381f30 (patch) | |
| tree | 37a9d882bc18d9975b4b8b2e40f4e43a190d0c24 /include/linux/irq.h | |
| parent | genirq: Make early_irq_init() print out more informative (diff) | |
| download | wireguard-linux-201d7f47f34bd7cb19161d0426f13b141e381f30.tar.xz wireguard-linux-201d7f47f34bd7cb19161d0426f13b141e381f30.zip | |
genirq: Handle NOAUTOEN interrupt setup proper
If an interrupt is marked NOAUTOEN then request_irq() installs the action,
but does not enable the interrupt via startup_irq(). The interrupt is
enabled via enable_irq() later from the driver. enable_irq() calls
irq_enable().
That means that for interrupts which have a irq_startup() callback this
callback is never invoked. Neither is irq_domain_activate_irq() invoked for
such interrupts.
If an interrupt depends on irq_startup() or irq_domain_activate_irq() then
the enable via irq_enable() is not enough.
Add a status flag IRQD_IRQ_STARTED_UP and use this to select the proper
mechanism in enable_irq(). Use the flag also to avoid pointless calls into
the low level functions.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: dianders@chromium.org
Cc: jeffy <jeffy.chen@rock-chips.com>
Cc: Brian Norris <briannorris@chromium.org>
Cc: tfiga@chromium.org
Link: http://lkml.kernel.org/r/20170531100212.130986205@linutronix.de
Diffstat (limited to 'include/linux/irq.h')
| -rw-r--r-- | include/linux/irq.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/irq.h b/include/linux/irq.h index f887351aa80e..94d1ad6ffdd4 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -216,6 +216,7 @@ enum { IRQD_WAKEUP_ARMED = (1 << 19), IRQD_FORWARDED_TO_VCPU = (1 << 20), IRQD_AFFINITY_MANAGED = (1 << 21), + IRQD_IRQ_STARTED = (1 << 22), }; #define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors) @@ -329,6 +330,11 @@ static inline void irqd_clr_activated(struct irq_data *d) __irqd_to_state(d) &= ~IRQD_ACTIVATED; } +static inline bool irqd_is_started(struct irq_data *d) +{ + return __irqd_to_state(d) & IRQD_IRQ_STARTED; +} + #undef __irqd_to_state static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) |