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Re: [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts

From Robert Jarzmik <robert.jarzmik@free.fr>
Newsgroups linux.kernel
Subject Re: [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts
Date 2017-01-20 09:00 +0100
Message-ID <t1Ch4-4tl-5@gated-at.bofh.it> (permalink)
References (5 earlier) <t0TMZ-1Eh-15@gated-at.bofh.it> <t0USK-2fJ-29@gated-at.bofh.it> <t0XQC-49m-13@gated-at.bofh.it> <t1nrI-3IU-27@gated-at.bofh.it> <t1qIW-5ER-21@gated-at.bofh.it>
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Jan Kiszka <jan.kiszka@siemens.com> writes:

> When using the a device with edge-triggered interrupts, such as MSIs,
> the interrupt handler has to ensure that there is a point in time during
> its execution where all interrupts sources are silent so that a new
> event can trigger a new interrupt again.
>
> This is achieved here by disabling all interrupt sources for a moment
> before processing them according to the status register. If a new
> interrupt should have arrived after we read the status, it will now
> re-trigger the interrupt, even in edge mode.
>
> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>

Cheers.

--
Robert

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Re: [PATCH v2 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Robert Jarzmik <robert.jarzmik@free.fr> - 2017-01-17 09:00 +0100
  Re: [PATCH v2 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Jan Kiszka <jan.kiszka@siemens.com> - 2017-01-17 09:10 +0100
    Re: [PATCH v2 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Robert Jarzmik <robert.jarzmik@free.fr> - 2017-01-18 09:30 +0100
      Re: [PATCH v2 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Jan Kiszka <jan.kiszka@siemens.com> - 2017-01-18 10:40 +0100
        Re: [PATCH v2 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Mark Brown <broonie@kernel.org> - 2017-01-18 13:50 +0100
          Re: [PATCH v2 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Jan Kiszka <jan.kiszka@siemens.com> - 2017-01-19 17:10 +0100
            [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Jan Kiszka <jan.kiszka@siemens.com> - 2017-01-19 20:40 +0100
              Re: [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered  interrupts Andy Shevchenko <andriy.shevchenko@linux.intel.com> - 2017-01-19 21:10 +0100
                Re: [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Mark Brown <broonie@kernel.org> - 2017-01-20 13:30 +0100
                Re: [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Jan Kiszka <jan.kiszka@siemens.com> - 2017-01-20 16:40 +0100
                Re: [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Mark Brown <broonie@kernel.org> - 2017-01-20 18:40 +0100
              Re: [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Mark Brown <broonie@kernel.org> - 2017-01-19 21:30 +0100
              Re: [PATCH v3 2/3] spi: pxa2xx: Prepare for edge-triggered interrupts Robert Jarzmik <robert.jarzmik@free.fr> - 2017-01-20 09:00 +0100
            Applied "spi: pxa2xx: Prepare for edge-triggered interrupts" to the spi tree Mark Brown <broonie@kernel.org> - 2017-01-24 19:50 +0100

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