From: Greg KH <gregkh@linuxfoundation.org>
To: yunhua li <yunhual@gmail.com>
Cc: linux-usb@vger.kernel.org
Subject: Re: Per USB device interrupt handler for xhci
Date: Sat, 6 Jul 2019 06:46:27 +0200 [thread overview]
Message-ID: <20190706044627.GA21685@kroah.com> (raw)
In-Reply-To: <CAMqbrUg3bz=i8nh4W2-NWOsnQdqcaB3nvZnMJQ1sGXuD0ogk7Q@mail.gmail.com>
On Fri, Jul 05, 2019 at 07:50:28PM -0700, yunhua li wrote:
> Hi all
>
> xhci_msi_irq is the interrupt handler for xhci, the controller it self
> is a PCI device, on my system it is a Intel chip. I have multiple USB
> device connect to this USB host controller, xhci_msi_irq is interrupt
> handler for the PCI device(USB Host controller).
> Is it possible to have multiple IRQ, and different IRQ for different
> USB device?
Nope. That is not how USB works. Please read the xhci spec if you are
curious as to why.
greg k-h
next prev parent reply other threads:[~2019-07-06 4:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-06 2:50 Per USB device interrupt handler for xhci yunhua li
2019-07-06 4:46 ` Greg KH [this message]
2019-07-08 19:58 ` yunhua li
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