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| author | Grygorii Strashko <grygorii.strashko@ti.com> | 2015-11-10 10:58:12 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-11-10 15:11:31 +0100 |
| commit | 4717f133736dec10605da9e29e707144c8d486df (patch) | |
| tree | 183a0d10e42d7bbcdc36fa93041c82e11e6f7097 /kernel/irq/pm.c | |
| parent | Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/k... (diff) | |
| download | linux-4717f133736dec10605da9e29e707144c8d486df.tar.xz linux-4717f133736dec10605da9e29e707144c8d486df.zip | |
genirq/PM: Restore system wake up from chained interrupts
Commit e509bd7da149 ("genirq: Allow migration of chained interrupts
by installing default action") breaks PCS wake up IRQ behaviour on
TI OMAP based platforms (dra7-evm).
TI OMAP IRQ wake up configuration:
GIC-irqchip->PCM_IRQ
|- omap_prcm_register_chain_handler
|- PRCM-irqchip -> PRCM_IO_IRQ
|- pcs_irq_chain_handler
|- pinctrl-irqchip -> PCS_uart1_wakeup_irq
This happens because IRQ PM code (irq/pm.c) is expected to ignore
chained interrupts by default:
static bool suspend_device_irq(struct irq_desc *desc)
{
if (!desc->action || desc->no_suspend_depth)
return false;
- it's expected !desc->action = true for chained interrupts;
but, after above change, all chained interrupt descriptors will
have default action handler installed - chained_action.
As result, chained interrupts will be silently disabled during system
suspend.
Hence, fix it by introducing helper function irq_desc_is_chained() and
use it in suspend_device_irq() for chained interrupts identification
and skip them, once detected.
Fixes: e509bd7da149 ("genirq: Allow migration of chained interrupts..")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: <nsekhar@ti.com>
Cc: <linux-arm-kernel@lists.infradead.org>
Cc: Tony Lindgren <tony@atomide.com>
Link: http://lkml.kernel.org/r/1447149492-20699-1-git-send-email-grygorii.strashko@ti.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/irq/pm.c')
| -rw-r--r-- | kernel/irq/pm.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index 21c62617a35a..84ab239a00e2 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -70,7 +70,8 @@ void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action) static bool suspend_device_irq(struct irq_desc *desc) { - if (!desc->action || desc->no_suspend_depth) + if (!desc->action || irq_desc_is_chained(desc) || + desc->no_suspend_depth) return false; if (irqd_is_wakeup_set(&desc->irq_data)) { |