From mboxrd@z Thu Jan 1 00:00:00 1970 From: Aaron Lu Subject: [PATCH] ACPI / Thermal / video: fix max_level incorrect value Date: Sat, 21 May 2016 15:55:00 +0800 Message-ID: <20160521075500.GA22025@aaronlu.sh.intel.com> References: <4736.1463510462@turing-police.cc.vt.edu> <6459.1463698397@turing-police.cc.vt.edu> <7208.1463713500@turing-police.cc.vt.edu> <6674547c-cefb-1b93-893a-7c5909a180a7@intel.com> <2897.1463727728@turing-police.cc.vt.edu> <20160520071720.GA30152@aaronlu.sh.intel.com> <29833.1463789712@turing-police.cc.vt.edu> <20160521032933.GA12918@aaronlu.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mga01.intel.com ([192.55.52.88]:31875 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751672AbcEUHzD (ORCPT ); Sat, 21 May 2016 03:55:03 -0400 Content-Disposition: inline In-Reply-To: <20160521032933.GA12918@aaronlu.sh.intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Valdis.Kletnieks@vt.edu Cc: "Rafael J. Wysocki" , "Rafael J. Wysocki" , Linux Kernel Mailing List , ACPI Devel Maling List , Len Brown On Sat, May 21, 2016 at 11:29:33AM +0800, Aaron Lu wrote: > My bad, I see the problem here: the acpi_video_device_lcd_query_levels > called in acpi_video_run_bcl_for_osi didn't do the proper conversion. > The acpi_handle is a "void *" so there is no warnings... I think I have found the problem, please give the patch a test, thanks. From: Aaron Lu Date: Sat, 21 May 2016 15:30:46 +0800 Subject: [PATCH] ACPI / Thermal / video: fix max_level incorrect value commit 059500940def("ACPI/video: export acpi_video_get_levels") mistakenly dropped the correct value of max_level and that caused the set_level function following failed and the acpi_video backlight interface didn't get created. Fix this by passing back the correct max_level value. While at it, also fix the param used in acpi_video_device_lcd_query_levels where acpi_handle is expected but acpi_video_device is passed. Reported-by: Valdis Kletnieks Signed-off-by: Aaron Lu --- drivers/acpi/acpi_video.c | 9 ++++++--- drivers/thermal/int340x_thermal/int3406_thermal.c | 2 +- include/acpi/video.h | 6 ++++-- 3 files changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/acpi/acpi_video.c b/drivers/acpi/acpi_video.c index 3d5b8a099351..c1d138e128cb 100644 --- a/drivers/acpi/acpi_video.c +++ b/drivers/acpi/acpi_video.c @@ -754,7 +754,8 @@ static int acpi_video_bqc_quirk(struct acpi_video_device *device, } int acpi_video_get_levels(struct acpi_device *device, - struct acpi_video_device_brightness **dev_br) + struct acpi_video_device_brightness **dev_br, + int *pmax_level) { union acpi_object *obj = NULL; int i, max_level = 0, count = 0, level_ac_battery = 0; @@ -841,6 +842,8 @@ int acpi_video_get_levels(struct acpi_device *device, br->count = count; *dev_br = br; + if (pmax_level) + *pmax_level = max_level; out: kfree(obj); @@ -869,7 +872,7 @@ acpi_video_init_brightness(struct acpi_video_device *device) struct acpi_video_device_brightness *br = NULL; int result = -EINVAL; - result = acpi_video_get_levels(device->dev, &br); + result = acpi_video_get_levels(device->dev, &br, &max_level); if (result) return result; device->brightness = br; @@ -1737,7 +1740,7 @@ static void acpi_video_run_bcl_for_osi(struct acpi_video_bus *video) mutex_lock(&video->device_list_lock); list_for_each_entry(dev, &video->video_device_list, entry) { - if (!acpi_video_device_lcd_query_levels(dev, &levels)) + if (!acpi_video_device_lcd_query_levels(dev->dev->handle, &levels)) kfree(levels); } mutex_unlock(&video->device_list_lock); diff --git a/drivers/thermal/int340x_thermal/int3406_thermal.c b/drivers/thermal/int340x_thermal/int3406_thermal.c index 13d431cbd29e..a578cd257db4 100644 --- a/drivers/thermal/int340x_thermal/int3406_thermal.c +++ b/drivers/thermal/int340x_thermal/int3406_thermal.c @@ -177,7 +177,7 @@ static int int3406_thermal_probe(struct platform_device *pdev) return -ENODEV; d->raw_bd = bd; - ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br); + ret = acpi_video_get_levels(ACPI_COMPANION(&pdev->dev), &d->br, NULL); if (ret) return ret; diff --git a/include/acpi/video.h b/include/acpi/video.h index 70a41f742037..5731ccb42585 100644 --- a/include/acpi/video.h +++ b/include/acpi/video.h @@ -51,7 +51,8 @@ extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type); */ extern bool acpi_video_handles_brightness_key_presses(void); extern int acpi_video_get_levels(struct acpi_device *device, - struct acpi_video_device_brightness **dev_br); + struct acpi_video_device_brightness **dev_br, + int *pmax_level); #else static inline int acpi_video_register(void) { return 0; } static inline void acpi_video_unregister(void) { return; } @@ -72,7 +73,8 @@ static inline bool acpi_video_handles_brightness_key_presses(void) return false; } static inline int acpi_video_get_levels(struct acpi_device *device, - struct acpi_video_device_brightness **dev_br) + struct acpi_video_device_brightness **dev_br, + int *pmax_level) { return -ENODEV; } -- 2.5.5