linux-kernel - Re: sharing interrupt between PCI device

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Date:	Tue, 04 Nov 2008 18:28:28 -0600
From:	Robert Hancock <hancockr@...w.ca>
To:	Nobin Mathew <nobin.mathew@...il.com>
CC:	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: sharing interrupt between PCI device

Nobin Mathew wrote:
> Hi,
> 
> I think this question is already asked in this mailing list and Sorry
> for asking this again.
> 
> My problem is this:
> 
> I have two PCI devices ( also two kernel drivers for those) which
> shares the interupt. When I remove one driver other device stops
> working, which is happening due to pci_disable_device () in removed
> driver. This call is disabling the shared interrupt.

pci_disable_device shouldn't be disabling the interrupt line, at least 
not in this case. Without more details on the platform or drivers, it's 
difficult to say why this would happen.

> 
> We can avoid this by just removing the pci_disable_device () in the
> driver, but i dont think this is a good way (correct me if I am
> wrong).
> 
> Can you suggest some ways to overcome this issue.

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