Re: [linux-pm] [RFC PATCH 2/3] PCI: parallel resume for pci devices on bus 0

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, 19 Dec 2008, Zhang Rui wrote:

> device parallel resume support for PCI devices

There are some PCI devices which won't work right if they are resumed
in parallel.  The example I have in mind is a USB host controller
device with both a high-speed EHCI controller function and some
companion low/full-speed UHCI or OHCI controller functions.  The EHCI
driver relies on the fact that the EHCI controller has a higher
function number and therefore is resumed _after_ the companion
controllers.

We need a way to express dependencies like this between devices.  Or at 
least, there has to be a way to prevent certain devices from resuming 
in parallel.

Alan Stern

--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [DMA Engine]     [Linux Coverity]     [Linux USB]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [Greybus]

  Powered by Linux