From: Lin Ming <ming.m.lin@intel.com>
To: Norbert Preining <preining@logic.at>
Cc: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org, jeff@garzik.org,
Tejun Heo <tj@kernel.org>,
"stern@rowland.harvard.edu >> Alan Stern"
<stern@rowland.harvard.edu>,
linux-ide@vger.kernel.org,
Linux PM mailing list <linux-pm@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume, COMRESET failed
Date: Mon, 06 Feb 2012 09:36:58 +0800 [thread overview]
Message-ID: <1328492218.15079.38.camel@minggr> (raw)
In-Reply-To: <20120206004608.GA9413@gamma.logic.tuwien.ac.at>
On Mon, 2012-02-06 at 09:46 +0900, Norbert Preining wrote:
> Hi Lin,
>
>
> sorry for the delay, weekend I was off ...
>
> On Fr, 03 Feb 2012, Lin Ming wrote:
> > > Confirmed. Reverted 7faa33da9b7 on top of 6c073a7ee250 made
> > > the boot delay go away. dmesg from this boot attached.
> >
> > Dig into the code, but I can't find where the problem is.
> >
> > Anyway, does below DEBUG patch help?
> > Let's always stop the engine during hard reset.
>
> If you meant:
> "Try that patch on top of HEAD *without* reverting 7faa33da9b7?"
> then I can report that it does NOT help. With *only* this patch I still
> get 10sec delay, and otherwise nothing changes.
Does below help?
diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
index a72bfd0..33f7333 100644
--- a/drivers/ata/libahci.c
+++ b/drivers/ata/libahci.c
@@ -746,6 +746,9 @@ static void ahci_start_port(struct ata_port *ap)
/* enable FIS reception */
ahci_start_fis_rx(ap);
+ /* enable DMA */
+ ahci_start_engine(ap);
+
/* turn on LEDs */
if (ap->flags & ATA_FLAG_EM) {
ata_for_each_link(link, ap, EDGE) {
next prev parent reply other threads:[~2012-02-06 1:37 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-02 5:12 Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume, COMRESET failed Norbert Preining
2012-02-02 8:38 ` Srivatsa S. Bhat
2012-02-03 1:15 ` Lin Ming
2012-02-03 4:21 ` Lin Ming
2012-02-03 5:24 ` Norbert Preining
2012-02-03 5:34 ` Lin Ming
2012-02-03 5:43 ` Norbert Preining
2012-02-03 8:27 ` Lin Ming
2012-02-06 0:46 ` Norbert Preining
2012-02-06 1:36 ` Lin Ming [this message]
2012-02-06 2:40 ` Norbert Preining
2012-02-06 2:49 ` Lin Ming
2012-02-06 3:15 ` Norbert Preining
2012-02-06 4:42 ` Lin Ming
2012-02-06 16:19 ` Tejun Heo
2012-02-06 19:20 ` Brian Norris
2012-02-06 22:46 ` Norbert Preining
2012-02-08 9:10 ` Valdis.Kletnieks
2012-02-13 17:44 ` Tejun Heo
2012-02-15 5:15 ` Brian Norris
2012-02-15 16:57 ` Tejun Heo
2012-02-15 18:29 ` Jeff Garzik
2012-02-15 18:31 ` Tejun Heo
2012-02-15 19:18 ` Jeff Garzik
2012-02-15 23:39 ` Brian Norris
2012-02-16 16:22 ` Jeff Garzik
2012-02-16 14:20 ` Mark Lord
2012-02-16 16:19 ` Jeff Garzik
2012-02-03 4:29 ` Norbert Preining
2012-02-03 4:29 ` Norbert Preining
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