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Date:      Sat, 26 Mar 2005 12:06:35 +0200
From:      Maxim Sobolev <sobomax@portaone.com>
To:        Ian Dowse <iedowse@maths.tcd.ie>
Cc:        cvs-all@FreeBSD.ORG
Subject:   Re: cvs commit: src/sys/dev/usb usb.c
Message-ID:  <4245342B.70503@portaone.com>
In-Reply-To: <200503252051.aa57514@salmon.maths.tcd.ie>
References:  <200503252051.aa57514@salmon.maths.tcd.ie>

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Ian Dowse wrote:
> In message <424473BB.4010607@portaone.com>, Maxim Sobolev writes:
> 
>>This is still suboptimal, since even after this change when ehci is 
>>enabled some (if not most) USB devices are detected after system goes 
>>into milti-user mode. Obviously, this makes it impossible to mount root 
>>fs off the USB HDD/FDD/CD. The simplest way to solve this problem is to 
>>add some sufficiently long and configurable delay before mounting root 
>>fs (similar to one used by the SCSI) when ehci is enabled to let those 
>>devices to be detected and attached.
> 
> 
> Could you send me an example dmesg that shows this? As far as I
> know, doing the explore when cold == 1 should attach all USB devices
> before even interrupts are enabled.
> 
> This should be the case with PCI USB host controllers that are
> compiled into the kernel or pre-loaded by the loader - if you load
> the module later and I think also with cardbus USB controllers,
> then the USB host controller won't get attached with cold == 1 so
> none of the early exploration code runs.

I don't use any modules - usb controllers and specific drivers are 
compiled statically into the kernel. You can find dmesg here:

http://www.portaone.com/~sobomax/dmesg

-Maxim



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