[ 3.5.y.z extended stable ] Patch "libata: set dma_mode to 0xff in reset" has been added to staging queue
Herton Ronaldo Krzesinski
herton.krzesinski at canonical.com
Mon Jan 7 20:36:20 UTC 2013
This is a note to let you know that I have just added a patch titled
libata: set dma_mode to 0xff in reset
to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree
which can be found at:
http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Herton
------
>From a0bccf7c75c7a76d81fd37e1a29d03304048de01 Mon Sep 17 00:00:00 2001
From: Aaron Lu <aaron.lu at intel.com>
Date: Mon, 3 Dec 2012 11:35:02 +0800
Subject: [PATCH] libata: set dma_mode to 0xff in reset
commit 5416912af75de9cba5d1c75b99a7888b0bbbd2fb upstream.
ata_device->dma_mode's initial value is zero, which is not a valid dma
mode, but ata_dma_enabled will return true for this value. This patch
sets dma_mode to 0xff in reset function, so that ata_dma_enabled will
not return true for this case, or it will cause problem for pata_acpi.
The corrsponding bugzilla page is at:
https://bugzilla.kernel.org/show_bug.cgi?id=49151
Reported-by: Phillip Wood <phillip.wood at dunelm.org.uk>
Signed-off-by: Aaron Lu <aaron.lu at intel.com>
Tested-by: Szymon Janc <szymon at janc.net.pl>
Tested-by: Dutra Julio <dutra.julio at gmail.com>
Acked-by: Alan Cox <alan at linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik at redhat.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
drivers/ata/libata-core.c | 1 +
drivers/ata/libata-eh.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 71e8385..96f0847 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2536,6 +2536,7 @@ int ata_bus_probe(struct ata_port *ap)
* bus as we may be talking too fast.
*/
dev->pio_mode = XFER_PIO_0;
+ dev->dma_mode = 0xff;
/* If the controller has a pio mode setup function
* then use it to set the chipset to rights. Don't
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 6d53cf9..430a248 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2618,6 +2618,7 @@ int ata_eh_reset(struct ata_link *link, int classify,
* bus as we may be talking too fast.
*/
dev->pio_mode = XFER_PIO_0;
+ dev->dma_mode = 0xff;
/* If the controller has a pio mode setup function
* then use it to set the chipset to rights. Don't
--
1.7.9.5
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