From: Tejun Heo <htejun@gmail.com>
To: Bruce Stenning <b.stenning@indigovision.com>
Cc: Mark Lord <kernel@teksavvy.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>
Subject: Re: sata_mv port lockup on hotplug (kernel 2.6.38.2)
Date: Tue, 26 Apr 2011 15:50:27 +0200 [thread overview]
Message-ID: <20110426135027.GI878@htj.dyndns.org> (raw)
In-Reply-To: <C1438B59050E1B4C9482FF3266AD6BA32C77554BDC@gretna.indigovision.com>
On Tue, Apr 26, 2011 at 02:13:22PM +0100, Bruce Stenning wrote:
> Tejun wrote:
> > ata4 is reporting link down and the device is detached and port
> > disabled afterwards. Doesn't seem to have much to do with
> > freezing/thawing?
>
> After all processing of a normal unplug event has completed, the port is left
> thawed (and the irq enabled) to allow future hotplug events on this port to be
> actioned. In the case of the port lockups that I have seen the port appears
> to be left frozen, with the irq disabled, and I am hypothesising that this is
> due to a race between the freeze and the thaw.
>
> Below is some additional tracing leading up to a port lockup, with some more
> DPRINTK statements added. The port freeze appears to be happening after the
> port thaw. The irq mask writes that are output by mv_set_main_irq_mask seem
> to show the irqs left masked off.
Does the following patch resolve the problem?
Thanks.
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 88cd22f..73f0589 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2802,19 +2802,6 @@ int ata_eh_reset(struct ata_link *link, int classify,
}
/*
- * Some controllers can't be frozen very well and may set
- * spuruious error conditions during reset. Clear accumulated
- * error information. As reset is the final recovery action,
- * nothing is lost by doing this.
- */
- spin_lock_irqsave(link->ap->lock, flags);
- memset(&link->eh_info, 0, sizeof(link->eh_info));
- if (slave)
- memset(&slave->eh_info, 0, sizeof(link->eh_info));
- ap->pflags &= ~ATA_PFLAG_EH_PENDING;
- spin_unlock_irqrestore(link->ap->lock, flags);
-
- /*
* Make sure onlineness and classification result correspond.
* Hotplug could have happened during reset and some
* controllers fail to wait while a drive is spinning up after
next prev parent reply other threads:[~2011-04-26 13:50 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <C1438B59050E1B4C9482FF3266AD6BA32C7493557A@gretna.indigovision.com>
[not found] ` <C1438B59050E1B4C9482FF3266AD6BA32C7493559F@gretna.indigovision.com>
2011-04-06 21:00 ` sata_mv port lockup on hotplug (kernel 2.6.38.2) Alejandro Riveira Fernández
[not found] ` <4D9CD275.9000002@teksavvy.com>
2011-04-08 12:43 ` Bruce Stenning
2011-04-09 0:48 ` Mark Lord
2011-04-12 10:30 ` Bruce Stenning
2011-04-12 14:07 ` Mark Lord
2011-04-12 14:55 ` Mark Lord
2011-04-23 0:56 ` Tejun Heo
2011-04-25 11:07 ` Bruce Stenning
2011-04-25 11:30 ` Tejun Heo
2011-04-26 18:27 ` Mark Lord
2011-04-25 14:54 ` Bruce Stenning
2011-04-25 16:22 ` Tejun Heo
2011-04-26 13:13 ` Bruce Stenning
2011-04-26 13:50 ` Tejun Heo [this message]
2011-04-26 15:41 ` Bruce Stenning
2011-04-26 15:52 ` Tejun Heo
2011-04-26 16:05 ` Bruce Stenning
2011-04-30 14:01 ` Tejun Heo
2011-05-17 15:30 ` Bruce Stenning
2011-05-25 9:41 ` Tejun Heo
2011-05-25 13:36 ` Bruce Stenning
2011-05-25 22:27 ` Mark Lord
2011-05-30 13:07 ` Bruce Stenning
2011-05-31 2:04 ` Mark Lord
2011-06-10 12:28 ` Mark Lord
2011-06-10 14:01 ` Tejun Heo
2011-06-10 17:32 ` Mark Lord
2011-06-10 17:39 ` Jeff Garzik
2011-06-10 20:49 ` Mark Lord
2011-06-10 21:20 ` Jeff Garzik
2011-06-11 12:19 ` Tejun Heo
2011-06-12 17:10 ` Mark Lord
2011-06-13 10:48 ` Tejun Heo
2011-08-29 15:49 ` Bruce Stenning
2011-09-02 1:13 ` Tejun Heo
2011-09-02 16:22 ` Bruce Stenning
2011-09-06 3:45 ` Tejun Heo
2011-09-06 12:19 ` Bruce Stenning
2011-09-06 16:33 ` Tejun Heo
2011-09-06 16:42 ` Tejun Heo
2011-09-07 12:09 ` Bruce Stenning
2011-09-08 1:16 ` Tejun Heo
2011-09-06 12:26 ` Bruce Stenning
2011-09-06 14:40 ` Bruce Stenning
2011-09-06 15:22 ` Bruce Stenning
2011-04-26 18:37 ` Mark Lord
2011-04-13 15:10 ` Mark Lord
2011-04-13 16:13 ` Bruce Stenning
2011-04-14 16:50 ` Bruce Stenning
2011-04-15 0:28 ` Mark Lord
2011-04-15 13:21 ` Bruce Stenning
2011-04-15 15:36 ` Mark Lord
2011-04-18 10:30 ` Bruce Stenning
2011-04-23 0:56 ` Tejun Heo
2011-04-15 3:15 ` Mikael Abrahamsson
2011-04-15 3:32 ` Mark Lord
2011-04-15 7:43 ` Mikael Abrahamsson
2011-04-15 12:35 ` Mark Lord
2011-04-15 14:04 ` Mikael Abrahamsson
2011-04-15 15:30 ` Mark Lord
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