Date: Tue, 15 Nov 2011 14:19:04 -0800 From: mdf@FreeBSD.org To: Hans Petter Selasky <hselasky@c2i.net> Cc: "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org> Subject: Re: svn commit: r227541 - head/sys/dev/usb/controller Message-ID: <CAMBSHm_GVxw0tROLzB7v%2BMf2v7T9hN7zU%2BVW_2e%2BVFpKuchbBg@mail.gmail.com> In-Reply-To: <201111152222.17549.hselasky@c2i.net> References: <201111152048.pAFKmvNC016452@svn.freebsd.org> <201111152202.24093.hselasky@c2i.net> <CAMBSHm8HXCfF3yVp9fFwAAThL6Aaki=iuV7-Qtz3g7tpsm-VLw@mail.gmail.com> <201111152222.17549.hselasky@c2i.net>
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On Tue, Nov 15, 2011 at 1:22 PM, Hans Petter Selasky <hselasky@c2i.net> wro= te: > On Tuesday 15 November 2011 22:20:18 mdf@freebsd.org wrote: >> On Tue, Nov 15, 2011 at 1:02 PM, Hans Petter Selasky <hselasky@c2i.net> > wrote: >> > For USB compliant operation, the USB stack requires hz to be greater o= r >> > equal to 250 hz, to put it like that. Mostly a requirement in USB >> > gadget/device mode. >> >> Really? =A0That's news to me. =A0Is that documented somewhere? =A0I know= we >> still use hz=3D100 internally, but we're on stable/7 still so not using >> the new USB stack yet. > > No it is not documented anywhere. This delay is mostly critical if you en= able > USB power saving features like suspend and resume. Then there are some > software timers which should not derive too much. Actually, if the bug is only with the power_save mode, then perhaps it should only be warned when that mode is enabled. Thanks, matthew
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