On 2014-01-05 15:13, Ivaylo Dimitrov wrote:
> From: Ivaylo Dimitrov <freemangordon@xxxxxx>
>
> Commit c37dd677988ca50bc8bc60ab5ab053720583c168 fixes the unbalanced
> unlock in acx565akm_enable but introduces another problem - if
> acx565akm_panel_power_on exits early, the mutex is not unlocked. Fix
> that by unlocking the mutex on early return. Also add mutex protection in
> acx565akm_panel_power_off and remove an unused variable
>
I think this is just getting more messy. How about we more or less revert the c37dd677988ca50bc8bc60ab5ab053720583c168 and fix it like this:
diff --git a/drivers/video/omap2/displays-new/panel-sony-acx565akm.c b/drivers/video/omap2/displays-new/panel-sony-acx565akm.c
index 714ee92dfb9f..8e97d06921ff 100644
--- a/drivers/video/omap2/displays-new/panel-sony-acx565akm.c
+++ b/drivers/video/omap2/displays-new/panel-sony-acx565akm.c
@@ -346,28 +346,22 @@ static int acx565akm_get_actual_brightness(struct panel_drv_data *ddata)
static int acx565akm_bl_update_status(struct backlight_device *dev)
{
struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
- int r;
int level;
dev_dbg(&ddata->spi->dev, "%s\n", __func__);
- mutex_lock(&ddata->mutex);
-
if (dev->props.fb_blank == FB_BLANK_UNBLANK &&
dev->props.power == FB_BLANK_UNBLANK)
level = dev->props.brightness;
else
level = 0;
- r = 0;
if (ddata->has_bc)
acx565akm_set_brightness(ddata, level);
else
- r = -ENODEV;
-
- mutex_unlock(&ddata->mutex);
+ return -ENODEV;
- return r;
+ return 0;
}
static int acx565akm_bl_get_intensity(struct backlight_device *dev)
@@ -390,9 +384,33 @@ static int acx565akm_bl_get_intensity(struct backlight_device *dev)
return 0;
}
+static int acx565akm_bl_update_status_locked(struct backlight_device *dev)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+ int r;
+
+ mutex_lock(&ddata->mutex);
+ r = acx565akm_bl_update_status(dev);
+ mutex_unlock(&ddata->mutex);
+
+ return r;
+}
+
+static int acx565akm_bl_get_intensity_locked(struct backlight_device *dev)
+{
+ struct panel_drv_data *ddata = dev_get_drvdata(&dev->dev);
+ int r;
+
+ mutex_lock(&ddata->mutex);
+ r = acx565akm_bl_get_intensity(dev);
+ mutex_unlock(&ddata->mutex);
+
+ return r;
+}
+
static const struct backlight_ops acx565akm_bl_ops = {
- .get_brightness = acx565akm_bl_get_intensity,
- .update_status = acx565akm_bl_update_status,
+ .get_brightness = acx565akm_bl_get_intensity_locked,
+ .update_status = acx565akm_bl_update_status_locked,
};
/*--------------------Auto Brightness control via Sysfs---------------------*/
@@ -526,8 +544,6 @@ static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
struct omap_dss_device *in = ddata->in;
int r;
- mutex_lock(&ddata->mutex);
-
dev_dbg(&ddata->spi->dev, "%s\n", __func__);
in->ops.sdi->set_timings(in, &ddata->videomode);
@@ -568,8 +584,6 @@ static int acx565akm_panel_power_on(struct omap_dss_device *dssdev)
set_display_state(ddata, 1);
set_cabc_mode(ddata, ddata->cabc_mode);
- mutex_unlock(&ddata->mutex);
-
return acx565akm_bl_update_status(ddata->bl_dev);
}
@@ -605,6 +619,7 @@ static void acx565akm_panel_power_off(struct omap_dss_device *dssdev)
static int acx565akm_enable(struct omap_dss_device *dssdev)
{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
int r;
dev_dbg(dssdev->dev, "%s\n", __func__);
@@ -615,7 +630,9 @@ static int acx565akm_enable(struct omap_dss_device *dssdev)
if (omapdss_device_is_enabled(dssdev))
return 0;
+ mutex_lock(&ddata->mutex);
r = acx565akm_panel_power_on(dssdev);
+ mutex_unlock(&ddata->mutex);
if (r)
return r;
Attachment:
signature.asc
Description: OpenPGP digital signature
