[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH] Register usb-uhci reset function.
From: |
Paul Brook |
Subject: |
Re: [Qemu-devel] [PATCH] Register usb-uhci reset function. |
Date: |
Tue, 16 Jun 2009 18:14:57 +0100 |
User-agent: |
KMail/1.11.4 (Linux/2.6.29-2-amd64; KDE/4.2.4; x86_64; ; ) |
On Tuesday 16 June 2009, Gleb Natapov wrote:
> Update irq line on reset. Reseting irq line is required because
> racing irq from pci device will call piix3_set_irq(). piix3_set_irq()
> will remember current level in pci_irq_levels[]. The PIC line will be
> triggered if one of pci_irq_levels[] is set (depends on piix3 config).
> If for instance pci_irq_levels[0] and pci_irq_levels[1] are mapped to
> the same PIC irq and during reset pci_irq_levels[1] == 1, but device
> that drives pci_irq_levels[0] is initialized first the device driver
> will not be able to lower irq line.
This is nonsense.
The only relevant circumstances are if the devices raises an IRQ, and is then
reset by software while the system is running. It's got nothing to do with
piix3, PCI bus interrupt sharing or system reset. If you are seeing problems
after a system reset then your bug lies elsewhere.
Paul
- [Qemu-devel] [PATCH] Register usb-uhci reset function., Gleb Natapov, 2009/06/16
- Re: [Qemu-devel] [PATCH] Register usb-uhci reset function.,
Paul Brook <=
- Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Gleb Natapov, 2009/06/16
- Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Paul Brook, 2009/06/16
- Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Gleb Natapov, 2009/06/16
- Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Paul Brook, 2009/06/16
- Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Zachary Amsden, 2009/06/16
- Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Gleb Natapov, 2009/06/17
Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Blue Swirl, 2009/06/16
Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Anthony Liguori, 2009/06/16
Re: [Qemu-devel] [PATCH] Register usb-uhci reset function., Filip Navara, 2009/06/17