From: Viresh Kumar <viresh.kumar@linaro.org>
To: Arnd Bergmann <arnd@kernel.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
Viresh Kumar <vireshk@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Cornelia Huck <cohuck@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:DRM DRIVER FOR QEMU'S CIRRUS DEVICE"
<virtualization@lists.linux-foundation.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
Marc Zyngier <maz@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"Enrico Weigelt, metux IT consult" <info@metux.net>,
Jason Wang <jasowang@redhat.com>,
Stratos Mailing List <stratos-dev@op-lists.linaro.org>
Subject: Re: [Stratos-dev] [PATCH V4 2/2] gpio: virtio: Add IRQ support
Date: Tue, 10 Aug 2021 13:05:12 +0530 [thread overview]
Message-ID: <20210810073512.5n5vsjvvurgdemk6@vireshk-i7> (raw)
In-Reply-To: <CAK8P3a0L3Wg8a8ips97KQ4OskGCZp-5i=LUV0DqcVq__wrEZAw@mail.gmail.com>
On 09-08-21, 13:19, Arnd Bergmann wrote:
> I don't see anything wrong with this version,
Great.
> but let's see what
> Marc thinks. I expect that he can still poke some holes in it, or
> at least find some simplifications.
Right, though I may resend the patches properly first to make it less
confusing.
> I was slightly surprised at the relation between the disabled and
> masked states, where 'disable' always implies 'mask' and
> 'enable' always implies 'unmask', but I don't actually know how
> those two are actually defined in the irqchip code in Linux, so
> I assume you did this correctly.
I did have a look at the irq-core, but didn't go in real depth. I
rather saw how stuff happens at the driver's end.
- On setup-irq, the core only calls enable() and not unmask().
- On interrupt, the core calls mask(), followed by unmask() (which can
be delayed for threaded irqs).
- On disable_irq(), the core only calls disable().
- On enable_irq(), the core only calls enable().
And so I ended up at this version :)
--
viresh
prev parent reply other threads:[~2021-08-10 7:35 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-03 11:36 [PATCH V4 0/2] gpio: Add virtio based driver Viresh Kumar
2021-08-03 11:36 ` [PATCH V4 1/2] gpio: Add virtio-gpio driver Viresh Kumar
2021-08-03 11:36 ` [PATCH V4 2/2] gpio: virtio: Add IRQ support Viresh Kumar
2021-08-03 15:01 ` Arnd Bergmann
2021-08-04 7:05 ` Viresh Kumar
2021-08-04 8:27 ` Arnd Bergmann
2021-08-05 7:05 ` Viresh Kumar
2021-08-05 11:26 ` Viresh Kumar
[not found] ` <0100017b1610f711-c53c79f2-9e28-4c45-bb42-8db09688b18e-000000@email.amazonses.com>
2021-08-05 12:03 ` [Stratos-dev] " Arnd Bergmann
2021-08-05 12:49 ` Viresh Kumar
2021-08-05 13:10 ` Arnd Bergmann
2021-08-06 7:44 ` Viresh Kumar
[not found] ` <0100017b1a6c0a05-e41dc16c-b326-4017-a63d-a24a6c1fde70-000000@email.amazonses.com>
2021-08-06 8:00 ` Arnd Bergmann
2021-08-09 7:30 ` Viresh Kumar
2021-08-09 7:55 ` Arnd Bergmann
2021-08-09 10:46 ` Viresh Kumar
[not found] ` <0100017b2a85eaf8-08b905fc-89f7-43a4-857e-070ca9691ce1-000000@email.amazonses.com>
2021-08-09 11:19 ` Arnd Bergmann
2021-08-10 7:35 ` Viresh Kumar [this message]
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