From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: [PATCH 2/3] ACPI / video: Always call acpi_video_init_brightness() on init Date: Thu, 18 Jul 2013 02:21:03 +0200 Message-ID: <2754766.4uAbGBBbb8@vostro.rjw.lan> References: <1370818899-8595-1-git-send-email-matthew.garrett@nebula.com> <1448863.3slS729B6b@vostro.rjw.lan> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7Bit Return-path: In-Reply-To: <1448863.3slS729B6b@vostro.rjw.lan> Sender: linux-kernel-owner@vger.kernel.org To: linux-acpi@vger.kernel.org Cc: Matthew Garrett , seth.forshee@canonical.com, joeyli.kernel@gmail.com, daniel.vetter@ffwll.ch, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, lenb@kernel.org, Aaron Lu , Igor Gnatenko , Yves-Alexis Perez , Felipe Contreras , "Lee, Chun-Yi" , Henrique de Moraes Holschuh List-Id: linux-acpi@vger.kernel.org From: Matthew Garrett We have to call acpi_video_init_brightness() even if we're not going to initialise the backlight - Thinkpads seem to use this as the trigger for enabling ACPI notifications rather than handling it in firmware. [rjw: Drop the brightness object created by acpi_video_init_brightness() if we are not going to use it.] Signed-off-by: Matthew Garrett Signed-off-by: Rafael J. Wysocki --- drivers/acpi/video.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) Index: linux-pm/drivers/acpi/video.c =================================================================== --- linux-pm.orig/drivers/acpi/video.c +++ linux-pm/drivers/acpi/video.c @@ -884,6 +884,9 @@ static void acpi_video_device_find_cap(s if (acpi_has_method(device->dev->handle, "_DDC")) device->cap._DDC = 1; + if (acpi_video_init_brightness(device)) + return; + if (acpi_video_backlight_support()) { struct backlight_properties props; struct pci_dev *pdev; @@ -893,9 +896,6 @@ static void acpi_video_device_find_cap(s static int count = 0; char *name; - result = acpi_video_init_brightness(device); - if (result) - return; name = kasprintf(GFP_KERNEL, "acpi_video%d", count); if (!name) return; @@ -955,6 +955,11 @@ static void acpi_video_device_find_cap(s if (result) printk(KERN_ERR PREFIX "Create sysfs link\n"); + } else { + /* Remove the brightness object. */ + kfree(device->brightness->levels); + kfree(device->brightness); + device->brightness = NULL; } }