Re: [PATCH] USB: fix interrupt disabling for HCDs with shared interrupt handlers
- Date: Mon, 30 Jun 2008 15:35:25 -0400 (EDT)
- From: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
- Subject: Re: [PATCH] USB: fix interrupt disabling for HCDs with shared interrupt handlers
On Mon, 30 Jun 2008, Stefan Becker wrote:
> Hi,
>
> here is the proposed patch to fix the problem. I hope I used git
> correctly to generate it...
> This patch doesn't modify the interface of usb_add_hcd(), i.e. HCD code
> can still use IRQF_DISABLED. It will now silently convert this into an
> internal HCD flag and clear IRQF_DISABLED before requesting the interrupt
> from the Linux core. usb_hcd_irq() will check this flag to disable/re-enable
> the interrupts on a case by case basis.
Don't bother with this extra stuff. All USB host controller drivers
want to have interrupts disabled when their IRQ handlers run.
Alan Stern
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