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From: Jeff Garzik <jeff@garzik.org>
To: Tejun Heo <htejun@gmail.com>
Cc: Linux IDE mailing list <linux-ide@vger.kernel.org>
Subject: [PATCH] libata-eh: call freeze hook before port abort
Date: Tue, 07 Apr 2009 17:38:57 -0400	[thread overview]
Message-ID: <49DBC7F1.3040801@garzik.org> (raw)

[-- Attachment #1: Type: text/plain, Size: 321 bytes --]


Tejun,

This patch looks like it might work for !PMP setups, but I am not so 
sure about PMP.

Any comments?  This should help begin addressing the problem where 
hardware needs the DMA engine turned off before accessing the taskfile 
registers -- something needed for ata_port_abort() via ata_qc_complete().

	Jeff





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diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 0183131..0b7ed40 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1013,8 +1013,8 @@ int ata_port_freeze(struct ata_port *ap)
 
 	WARN_ON(!ap->ops->error_handler);
 
-	nr_aborted = ata_port_abort(ap);
 	__ata_port_freeze(ap);
+	nr_aborted = ata_port_abort(ap);
 
 	return nr_aborted;
 }

             reply	other threads:[~2009-04-07 21:39 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-04-07 21:38 Jeff Garzik [this message]
2009-04-07 22:58 ` [PATCH] libata-eh: call freeze hook before port abort Tejun Heo

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