This is a note to let you know that I've just added the patch titled
libata: set dma_mode to 0xff in reset
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
libata-set-dma_mode-to-0xff-in-reset.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 5416912af75de9cba5d1c75b99a7888b0bbbd2fb Mon Sep 17 00:00:00 2001
From: Aaron Lu <[email protected]>
Date: Mon, 3 Dec 2012 11:35:02 +0800
Subject: libata: set dma_mode to 0xff in reset
From: Aaron Lu <[email protected]>
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 <[email protected]>
Signed-off-by: Aaron Lu <[email protected]>
Tested-by: Szymon Janc <[email protected]>
Tested-by: Dutra Julio <[email protected]>
Acked-by: Alan Cox <[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/ata/libata-core.c | 1 +
drivers/ata/libata-eh.c | 1 +
2 files changed, 2 insertions(+)
--- 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
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2600,6 +2600,7 @@ int ata_eh_reset(struct ata_link *link,
* 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
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/libata-set-dma_mode-to-0xff-in-reset.patch
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