Linus Torvalds wrote:
On Tue, 23 Sep 2003, Ruud Linders wrote:
I tried the patch but it doesn't work for me using an USB-2 Memory stick "DiskonKey" on an USB-2 port (with uhci_hcd & ehci_hcd loaded).
After a 3 minute time-out I get "SCSI device sda: drive cache: write through" and the device starts working just fine.
Is this different from a plain kernel _without_ the patch?
No difference.
Unloading the ehci_hcd module doesn't make any difference. Only when ripping out the whole mode-sense call it works immediately :-) so it appears the device is just unhappy about the sd_do_mode_sense.
Yes, I think we might want to mark USB devices as being write-through by default. That said, I think the patch is still better than what we have now (which just doesn't make any sense at all).
Fully agree here, 2.4.2x doesn't appear to do this mode_sense checking and works with all the usb-mass-storage devices I tried.
Linus
_ Ruud
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