From owner-freebsd-acpi@FreeBSD.ORG  Fri Apr 14 15:41:07 2006
Return-Path: <owner-freebsd-acpi@FreeBSD.ORG>
X-Original-To: acpi@FreeBSD.org
Delivered-To: freebsd-acpi@FreeBSD.ORG
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id F256916A400;
	Fri, 14 Apr 2006 15:41:06 +0000 (UTC) (envelope-from sos@FreeBSD.org)
Received: from spider.deepcore.dk
	(cpe.atm2-0-53484.0x50a6c9a6.abnxx9.customer.tele.dk
	[80.166.201.166])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 11CB543D45;
	Fri, 14 Apr 2006 15:41:05 +0000 (GMT) (envelope-from sos@FreeBSD.org)
Received: from sos.deepcore.dk (sos.deepcore.dk [194.192.25.130])
	by spider.deepcore.dk (8.13.6/8.13.4) with ESMTP id k3EFf4wp011328;
	Fri, 14 Apr 2006 17:41:04 +0200 (CEST)
	(envelope-from sos@FreeBSD.org)
From: =?ISO-8859-1?Q?S=F8ren?= Schmidt <sos@FreeBSD.org>
To: Mitsuru IWASAKI <iwasaki@jp.FreeBSD.org>
In-Reply-To: <20060414.233013.41626908.iwasaki@jp.FreeBSD.org>
References: <20060413.012156.56054177.iwasaki@jp.FreeBSD.org>
	<443F54DF.3080809@root.org>
	<20060414.180622.30189283.iwasaki@jp.FreeBSD.org>
	<20060414.233013.41626908.iwasaki@jp.FreeBSD.org>
Content-Type: text/plain; charset=iso8859-1
Organization: FreeBSD project
Date: Fri, 14 Apr 2006 17:41:03 +0200
Message-Id: <1145029263.912.4.camel@sos.deepcore.dk>
Mime-Version: 1.0
X-Mailer: Evolution 2.4.2.1 FreeBSD GNOME Team Port 
Content-Transfer-Encoding: 8bit
X-mail-scanned: by DeepCore Virus & Spam killer v1.16
Cc: acpi@FreeBSD.org, current@FreeBSD.org
Subject: Re: CFR: ACPI Dock driver
X-BeenThere: freebsd-acpi@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: sos@FreeBSD.org
List-Id: ACPI and power management development <freebsd-acpi.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>,
	<mailto:freebsd-acpi-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-acpi>
List-Post: <mailto:freebsd-acpi@freebsd.org>
List-Help: <mailto:freebsd-acpi-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-acpi>,
	<mailto:freebsd-acpi-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 14 Apr 2006 15:41:07 -0000

On Fre, 2006-04-14 at 23:30 +0900, Mitsuru IWASAKI wrote:
> Hi, Soren.
> I've found the problem with detached ATA channel suspending.
> After detaching second channel, the system drops into infinity
> loop at ata_suspend().
> I'll commit the following patches with acpi_dock patches, so
> please refine these if they have any problem.

Uhm, would this simple patch help you ?

--- ata-all.c   31 Mar 2006 08:09:04 -0000      1.271
+++ ata-all.c   14 Apr 2006 15:39:20 -0000
@@ -277,8 +277,8 @@
     if (!dev || !(ch = device_get_softc(dev)))
        return ENXIO;

-    /* wait for the channel to be IDLE before entering suspend mode */
-    while (1) {
+    /* wait for the channel to be IDLE or detached before suspending */
+    while (ch->r_irq) {
        mtx_lock(&ch->state_mtx);
        if (ch->state == ATA_IDLE) {
            ch->state = ATA_ACTIVE;

That I'll gladly commit for you instead...

-Søren

> 
> Thanks
> 
> Index: ata-all.c
> ===================================================================
> RCS file: /home/ncvs/src/sys/dev/ata/ata-all.c,v
> retrieving revision 1.271
> diff -u -r1.271 ata-all.c
> --- ata-all.c	31 Mar 2006 08:09:04 -0000	1.271
> +++ ata-all.c	14 Apr 2006 14:03:24 -0000
> @@ -277,6 +277,10 @@
>      if (!dev || !(ch = device_get_softc(dev)))
>  	return ENXIO;
>  
> +    /* if the channel is already detached, skip waiting for IDLE */
> +    if ((ch->state & ATA_STALL_QUEUE) == ATA_STALL_QUEUE)
> +	goto out;
> +
>      /* wait for the channel to be IDLE before entering suspend mode */
>      while (1) {
>  	mtx_lock(&ch->state_mtx);
> @@ -288,6 +292,7 @@
>  	mtx_unlock(&ch->state_mtx);
>  	tsleep(ch, PRIBIO, "atasusp", hz/10);
>      }
> +out:
>      ATA_LOCKING(dev, ATA_LF_UNLOCK);
>      return 0;
>  }
>