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List:       netbsd-bugs
Subject:    PR/43159 CVS commit: src/sys/dev/usb
From:       "Jonathan A. Kollasch" <jakllsch () NetBSD ! org>
Date:       2010-07-27 20:25:02
Message-ID: 20100727202502.6283F63BB0A () www ! NetBSD ! org
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The following reply was made to PR kern/43159; it has been noted by GNATS.

From: "Jonathan A. Kollasch" <jakllsch@netbsd.org>
To: gnats-bugs@gnats.NetBSD.org
Cc: 
Subject: PR/43159 CVS commit: src/sys/dev/usb
Date: Tue, 27 Jul 2010 20:20:46 +0000

 Module Name:	src
 Committed By:	jakllsch
 Date:		Tue Jul 27 20:20:46 UTC 2010
 
 Modified Files:
 	src/sys/dev/usb: ugen.c
 
 Log Message:
 Tune ugen(4) isochronous parameters to better support high speed pipes.
 
 Fixes PR#43159.
 
 Justification:
 
 UGEN_NISORFRMS, previously 4, is now 8 because that's the number of
 microframes per frame on a high speed bus.  This allows data to be
 transfered every microframe if necessary.
 
 UGEN_NISOREQS, previously 6, is now 4.  This is harder to justify,
 but I didn't think the total number of buffer frames needed to be
 much more than it was.
 
 UGEN_NISOFRAMES, previously 500, is now (UGEN_NISORFRMS * UGEN_NISOREQS)
 (32 with values as above).  This is all the more we've actually used.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.109 -r1.110 src/sys/dev/usb/ugen.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.
 
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