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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