Messages in this thread | | | Date | Mon, 07 Jul 2003 13:20:32 +0400 | From | "Ilia A. Petrov" <> | Subject | Re: [linux-usb-devel] PROBLEM: when booting from USB-HDD device kernel 2.4.21 is trying to mount root file system too early before usb device is found on the usb-bus |
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David Brownell wrote: > Ilia A. Petrov wrote: > >> When kernel is mounting root file system it is doing it too fast so >> usb-support have not ime to scan bus for mass-storage devices and >> connect them. >> ... >> or, imho better way, - when completing init of usb bus, first scans it >> and connect all devices and only after all devices were connected >> returns to main kernel code. > > > That might not entirely solve the problem, since the relevant device > could drop off the bus temporarily, but it seems like it'd be a step > forward. How would you make root hub ("bus") initialization do that?
i'm not familiar with linux usb implementation so may be it's wrong: after sending global reset over the bus you can manually check (not trough the hub driver) root port connection status and call enumeration if needed.
another way- add an option to kernel for booting from usb mass-storage, where place an input-waiting code, because my current solution adds such delay for all boots (ide,scsi,usb)
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