Bug 10936

Summary:	fw-ohci: DV reception with dvgrab broken on VT630x in OHCI 1.0 mode
Product:	Drivers	Reporter:	Stefan Richter (stefanr)
Component:	IEEE1394	Assignee:	drivers_ieee1394
Status:	REJECTED UNREPRODUCIBLE
Severity:	normal	CC:	jarod
Priority:	P1
Hardware:	All
OS:	Linux
Kernel Version:	2.6.22 and later	Subsystem:
Regression:	---	Bisected commit-id:

Description Stefan Richter 2008-06-18 13:47:39 UTC

fw-ohci works incorrectly with VIA VT6306 and VT6307 if the controller EEPROM programs them into OHCI 1.0 mode (most or all VT6306, many but not all VT6307):

DV reception with dvgrab stops after a few frames (one or two frames fro example).  Curiously, reception with kino actually works.

Last tested:  libraw1394 from Dan Dennedy's git repo (revision f9681ff59da0acca543ad5d15213c6253114f0ce from April 30 plus "Plug dir leak and initialize data structs"), dvgrab 3.1, kino 1.3.0

See downstream report at https://bugzilla.redhat.com/show_bug.cgi?id=415841

Comment 1 Stefan Richter 2008-12-18 15:25:37 UTC

This bug does not occur anymore in 2.6.27.7-53.fc9.x86_64 and 2.6.28-rc7.

Why?

Comment 2 Stefan Richter 2008-12-20 03:59:46 UTC

2.6.27.10 was also tested successfully here.  I did not change the base configuration of the kernel (CONFIG_HZ_*, CONFIG_PREEMPT* etc.) nor the hardware since my last unsuccessful test.  I don't remember what the last known bad kernel was.