Date: Sat, 26 Mar 2005 12:31:08 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: "M. Warner Losh" <imp@bsdimp.com> Cc: iedowse@FreeBSD.org Subject: Re: cvs commit: src/sys/dev/usb usb.c Message-ID: <20050326113107.GD2324@cicely12.cicely.de> In-Reply-To: <20050325.174202.25952471.imp@bsdimp.com> References: <200503171941.j2HJfKje003685@repoman.freebsd.org> <424473BB.4010607@portaone.com> <20050325.174202.25952471.imp@bsdimp.com>
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On Fri, Mar 25, 2005 at 05:42:02PM -0700, M. Warner Losh wrote: > In message: <424473BB.4010607@portaone.com> > Maxim Sobolev <sobomax@portaone.com> 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. > > /me notes that usb subsystem will know when it is done enumerating > devices. cardbus has a similar issue... It doesn't seem to work: Trying to mount root from ufs:/dev/ad0a umass1: Generic USB Storage Device, rev 1.10/1.00, addr 6 umass1: SCSI over Bulk-Only; quirks = 0x0000 umass1:2:1:-1: Attached to scbus2 da4 at umass-sim1 bus 1 target 0 lun 0 da4: <IC USB Storage-CFC 301b> Removable Direct Access SCSI-0 device da4: 1.000MB/s transfers da4: Attempt to query device size failed: NOT READY, Medium not present And this is not just CAM that is too late - it is the whole umass instance that gets attached after root mount. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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