This is a note to let you know that I've just added the patch titled
nouveau_acpi: convert acpi_get_handle() to acpi_has_method()
to the 3.12-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:
nouveau_acpi-convert-acpi_get_handle-to-acpi_has_method.patch
and it can be found in the queue-3.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 187b5b5d520c2318a1f88fb8d8913a9d7fbf7d92 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@xxxxxxxxx>
Date: Tue, 3 Sep 2013 08:32:00 +0800
Subject: nouveau_acpi: convert acpi_get_handle() to acpi_has_method()
From: Zhang Rui <rui.zhang@xxxxxxxxx>
commit 187b5b5d520c2318a1f88fb8d8913a9d7fbf7d92 upstream.
acpi_has_method() is a new ACPI API introduced to check
the existence of an ACPI control method.
It can be used to replace acpi_get_handle() in the case that
1. the calling function doesn't need the ACPI handle of the control method.
and
2. the calling function doesn't care the reason why the method is unavailable.
Convert acpi_get_handle() to acpi_has_method()
in drivers/gpu/drm/nouveau/nouveau_acpi.c in this patch.
Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
CC: Ben Skeggs <bskeggs@xxxxxxxxxx>
CC: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/nouveau/nouveau_acpi.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
--- a/drivers/gpu/drm/nouveau/nouveau_acpi.c
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -253,18 +253,15 @@ static struct vga_switcheroo_handler nou
static int nouveau_dsm_pci_probe(struct pci_dev *pdev)
{
- acpi_handle dhandle, nvidia_handle;
- acpi_status status;
+ acpi_handle dhandle;
int retval = 0;
dhandle = DEVICE_ACPI_HANDLE(&pdev->dev);
if (!dhandle)
return false;
- status = acpi_get_handle(dhandle, "_DSM", &nvidia_handle);
- if (ACPI_FAILURE(status)) {
+ if (!acpi_has_method(dhandle, "_DSM"))
return false;
- }
if (nouveau_test_dsm(dhandle, nouveau_dsm, NOUVEAU_DSM_POWER))
retval |= NOUVEAU_DSM_HAS_MUX;
Patches currently in stable-queue which might be from rui.zhang@xxxxxxxxx are
queue-3.12/nouveau_acpi-convert-acpi_get_handle-to-acpi_has_method.patch
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