linux-kernel - Re: [PATCH V5 2/2] gpio: virtio: Add IRQ support

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Date:   Wed, 18 Aug 2021 16:30:35 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Arnd Bergmann <arnd@...nel.org>, Marc Zyngier <maz@...nel.org>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Bill Mills <bill.mills@...aro.org>,
        Alex Bennée <alex.bennee@...aro.org>,
        Cornelia Huck <cohuck@...hat.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        stratos-dev@...lists.linaro.org, linux-kernel@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-gpio@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        Viresh Kumar <vireshk@...nel.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>
Subject: Re: [PATCH V5 2/2] gpio: virtio: Add IRQ support

On 10-08-21, 15:55, Viresh Kumar wrote:
> This patch adds IRQ support for the virtio GPIO driver. Note that this
> uses the irq_bus_lock/unlock() callbacks, since those operations over
> virtio may sleep. Also the notifications for the eventq are processed
> using a work item to allow sleep-able operations.
> 
> Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
>  drivers/gpio/Kconfig             |   1 +
>  drivers/gpio/gpio-virtio.c       | 301 ++++++++++++++++++++++++++++++-
>  include/uapi/linux/virtio_gpio.h |  25 +++
>  3 files changed, 323 insertions(+), 4 deletions(-)

Marc,

Will it be possible for you to have a look at this patch, it will help
us understand shortcomings of the specification better and this
implementation as well.

Thanks.

-- 
viresh