Re: [REGRESSION] [nailed] USB boot failure: USB: EHCI: make ehci-pcia separate driver

From: Andreas Mohr
Date: Wed Feb 13 2013 - 02:16:46 EST


On Wed, Feb 13, 2013 at 07:44:36AM +0100, Andreas Mohr wrote:
> So, what to do? I'm now going to do some experimentation with git revert
> on some revision, and I'm trying to establish the USB port dependency
> (BIOS-owned handoff root hub invisible!?, as discussed in initial mail).

After some bingo moment, seems the solution is easier than expected:

andi@andinet:~$ ls /tmp/initrd_extracted/lib/modules/3.7.0-rc5+/kernel/drivers/usb/host/
ehci-hcd.ko ohci-hcd.ko uhci-hcd.ko xhci-hcd.ko
andi@andinet:~$ ls /lib/modules/3.7.0-rc5+/kernel/drivers/usb/host/
ehci-hcd.ko isp116x-hcd.ko sl811_cs.ko uhci-hcd.ko
ehci-pci.ko ohci-hcd.ko sl811-hcd.ko whci
hwa-hc.ko r8a66597-hcd.ko u132-hcd.ko xhci-hcd.ko

So it's probably only that the initrd simply fails to ship
the ehci-pci.ko module (I could verify this by extending initrd content, BTW).
Now the question would be:
are modules listed in a static list on initramfs package/config side,
or does the kernel fail to signal the list of required modules properly?
(e.g. did some config-side files fail to get upgraded for this dependency??)

So maybe it's not a "regression" per se, but it's at least a grave
usability issue on kernel upgrade which should be handled as benignly as
possible (i.e., without any disruption).


Andreas Mohr
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