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authorAaron Lu <aaron.lu@intel.com>2016-05-21 15:30:46 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2016-05-30 13:53:09 +0200
commit9f9cd7ee2c05881f151e5ee4889e667a031dd8d9 (patch)
tree55c2c3702f9675afe8756c2bb9baa5bf7e127f42 /drivers/acpi/acpi_video.c
parente4f35c1339f0cfcf38d3f63dd6fea2b070399263 (diff)
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. Fixes: 059500940def (ACPI/video: export acpi_video_get_levels) Reported-and-tested-by: Valdis Kletnieks <valdis.kletnieks@vt.edu> Signed-off-by: Aaron Lu <aaron.lu@intel.com> Acked-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpi_video.c')
-rw-r--r--drivers/acpi/acpi_video.c9
1 files changed, 6 insertions, 3 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);