Re: [PATCH] USB BIOS early handoff only when the we the driver is configured
Alan Stern <[email protected]>
| Newsgroups | gmane.linux.usb.devel,gmane.linux.kernel |
|---|---|
| Message-ID | <[email protected]> |
On Thu, 2 Aug 2007, David Engraf wrote: > This would be solution too, but what if someone uses the uhci controller > and don't want the > ehci. So a single Kconfig flag wouldn't be enough, we have to add 3 > flags for uchi, ohci and > ehci. I think this maybe a little bit difficult when configuring the kernel. > The best solution would be when we could use the CONFIG_USB_xxxx_HCD > flag, but it > seems that some hardware has problems when we disable the handoff and > let the BIOS > control the usb controller. Do you know any of this hardware? The email messages are hidden in the depths of the linux-usb-devel archives. Maybe you can find them by checking the Git history for drivers/usb/host/pci-quirks.c, finding the dates for patches that affected the handoff code, and then searching through the archives near those dates. IIRC the problems arose on some MIPS machines. And I don't think the problem involved letting the firmware manage the USB controller; I think the problem came when the controller driver tried to do the handoff later on. Alan Stern ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel