[PATCH v2 0/6] ARM: at91: fix irq_pm_install_action WARNING
nicolas.ferre at atmel.com
Tue Mar 3 07:35:40 PST 2015
Le 02/03/2015 10:18, Boris Brezillon a écrit :
> My apologies to those of you who already received this series, but I
> didn't increment the patch version and forgot some subsystem maintainers
> and MLs.
> Commit cab303be91dc47942bc25de33dc1140123540800  introduced a WARN_ON
> test which triggers a WARNING backtrace on at91 platforms.
> While this WARN_ON is absolutely necessary to warn users that they should
> not mix request with and without IRQF_NO_SUSPEND flags on shared IRQs,
> there is no easy way to solve this issue on at91 platforms.
> The main reason is that the init timer is often using a shared irq line
> and thus request this irq with IRQF_NO_SUSPEND flag set, while other
> peripherals request the same irq line without this flag.
> This problem has recently been addressed by this patch  which adds
> a new IRQF_COND_SUSPEND flag, that authorize mixing IRQF_NO_SUSPEND and
> !IRQF_NO_SUSPEND as long as irq handlers setting IRQF_COND_SUSPEND
> can safely be called in suspended state.
> Doing this also implies taking care of system wakeup in devices handlers
> if they tag the IRQ line as a wakeup source.
> The first patch of this series exports the pm_system_wakeup symbol so
> that drivers can call pm_system_wakeup from their interrupt handler.
> This series then patches all at91 drivers that can have devices sharing
> their IRQ line with a timer.
> This series depends on .
I'm okay with all the patches:
Acked-by: Nicolas Ferre <nicolas.ferre at atmel.com>
As it seems easier to keep the whole series together, I'll let Rafael
Thanks a lot for having taking care of this.
> Changes since v1:
> - replaced the IRQF_SUSPEND_NOACTION flag by IRQF_COND_SUSPEND
> - properly addressed wakeup handling in drivers
> Boris Brezillon (6):
> PM / wakeup: export pm_system_wakeup symbol
> rtc: at91sam9: rework wakeup and interrupt handling
> rtc: at91rm9200: rework wakeup and interrupt handling
> clk: at91: implement suspend/resume for the PMC irqchip
> watchdog: at91sam9: request the irq with IRQF_NO_SUSPEND
> tty: serial: atmel: rework interrupt and wakeup handling
> drivers/base/power/wakeup.c | 1 +
> drivers/clk/at91/pmc.c | 20 ++++++++++-
> drivers/clk/at91/pmc.h | 1 +
> drivers/rtc/rtc-at91rm9200.c | 62 +++++++++++++++++++++++++--------
> drivers/rtc/rtc-at91sam9.c | 73 ++++++++++++++++++++++++++++++++-------
> drivers/tty/serial/atmel_serial.c | 49 +++++++++++++++++++++++---
> drivers/watchdog/at91sam9_wdt.c | 3 +-
> 7 files changed, 177 insertions(+), 32 deletions(-)
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