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Re: [PATCH 06/38] Annotate hardware config module parameters in drivers/clocksource/

From David Howells <dhowells@redhat.com>
Newsgroups linux.kernel
Subject Re: [PATCH 06/38] Annotate hardware config module parameters in drivers/clocksource/
Date 2017-04-18 14:50 +0200
Message-ID <txAJX-6e5-3@gated-at.bofh.it> (permalink)
References (3 earlier) <tsWBr-5sA-3@gated-at.bofh.it> <tsWUO-5zn-21@gated-at.bofh.it> <twim5-71X-5@gated-at.bofh.it> <twoUx-2NS-1@gated-at.bofh.it> <twsEN-4Zo-1@gated-at.bofh.it>
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Thomas Gleixner <tglx@linutronix.de> wrote:

> > > > Btw, is it possible to use IRQ grants to prevent a device that has limited
> > > > IRQ options from being drivable?
> > > 
> > > What do you mean with 'IRQ grants' ?
> > 
> > request_irq().
> 
> I still can't parse the sentence above. If request_irq() fails the device
> initialization fails. If you request the wrong irq then request_irq() might
> succeed but the device won't work.

I was talking about having using a driver to make request_irq() grant an irq
to that driver so that another driver can't bind to its device because all its
irq options are taken and the irqs can't be shared.

David

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Thread

Re: [PATCH 06/38] Annotate hardware config module parameters in  drivers/clocksource/ Thomas Gleixner <tglx@linutronix.de> - 2017-04-14 20:30 +0200
  Re: [PATCH 06/38] Annotate hardware config module parameters in drivers/clocksource/ David Howells <dhowells@redhat.com> - 2017-04-15 01:00 +0200
    Re: [PATCH 06/38] Annotate hardware config module parameters in  drivers/clocksource/ Thomas Gleixner <tglx@linutronix.de> - 2017-04-15 07:50 +0200
      Re: [PATCH 06/38] Annotate hardware config module parameters in drivers/clocksource/ David Howells <dhowells@redhat.com> - 2017-04-15 08:00 +0200
        Re: [PATCH 06/38] Annotate hardware config module parameters in  drivers/clocksource/ Thomas Gleixner <tglx@linutronix.de> - 2017-04-15 12:00 +0200
          Re: [PATCH 06/38] Annotate hardware config module parameters in drivers/clocksource/ David Howells <dhowells@redhat.com> - 2017-04-18 14:50 +0200
            Re: [PATCH 06/38] Annotate hardware config module parameters in  drivers/clocksource/ Thomas Gleixner <tglx@linutronix.de> - 2017-04-18 15:00 +0200
  Re: [PATCH 06/38] Annotate hardware config module parameters in drivers/clocksource/ David Howells <dhowells@redhat.com> - 2017-04-19 17:40 +0200
  Re: [PATCH 06/38] Annotate hardware config module parameters in drivers/clocksource/ David Howells <dhowells@redhat.com> - 2017-04-19 17:40 +0200

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