linux-kernel - Re: ohci1394 regression in 2.6.19-rc1

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Message-ID: <tkrat.9af0ae80a84cddfa@s5r6.in-berlin.de>
Date:	Fri, 6 Oct 2006 20:33:17 +0200 (CEST)
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Alistair John Strachan <s0348365@....ed.ac.uk>
cc:	Linus Torvalds <torvalds@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	bcollins@...ian.org, linux1394-devel@...ts.sourceforge.net
Subject: Re: ohci1394 regression in 2.6.19-rc1

Alistair, could you please test the following one-liner on top of
2.6.19-rc1?

-----------------

Date: Fri, 6 Oct 2006 19:49:52 +0200 (CEST)
From: Stefan Richter <stefanr@...6.in-berlin.de>
Subject: ieee1394: nodemgr: fix startup of knodemgrd

Revert a thinko in commit d2f119fe319528da8c76a1107459d6f478cbf28c:
When knodemgrd starts, it needs to sleep until host->generation was
incremented above its initial value of 0.  My wrong logic caused it to
start sending requests when the bus wasn't completely ready.  Seen as
"AT dma reset ctx=0, aborting transmission" messages in 2.6.19-rc1.

Signed-off-by: Stefan Richter <stefanr@...6.in-berlin.de>
---
Index: linux/drivers/ieee1394/nodemgr.c
===================================================================
--- linux.orig/drivers/ieee1394/nodemgr.c	2006-10-06 19:20:00.000000000 +0200
+++ linux/drivers/ieee1394/nodemgr.c	2006-10-06 19:26:28.000000000 +0200
@@ -1614,7 +1614,7 @@ static int nodemgr_host_thread(void *__h
 {
 	struct host_info *hi = (struct host_info *)__hi;
 	struct hpsb_host *host = hi->host;
-	unsigned int g, generation = get_hpsb_generation(host) - 1;
+	unsigned int g, generation = 0;
 	int i, reset_cycles = 0;
 
 	/* Setup our device-model entries */


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