diff options
Diffstat (limited to 'drivers/video/backlight/adp8870_bl.c')
| -rw-r--r-- | drivers/video/backlight/adp8870_bl.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c index 9d738352d7d4..21acac90fd77 100644 --- a/drivers/video/backlight/adp8870_bl.c +++ b/drivers/video/backlight/adp8870_bl.c @@ -807,10 +807,12 @@ static ssize_t adp8870_bl_ambient_light_zone_store(struct device *dev, /* Set user supplied ambient light zone */ mutex_lock(&data->lock); - adp8870_read(data->client, ADP8870_CFGR, ®_val); - reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); - reg_val |= (val - 1) << CFGR_BLV_SHIFT; - adp8870_write(data->client, ADP8870_CFGR, reg_val); + ret = adp8870_read(data->client, ADP8870_CFGR, ®_val); + if (!ret) { + reg_val &= ~(CFGR_BLV_MASK << CFGR_BLV_SHIFT); + reg_val |= (val - 1) << CFGR_BLV_SHIFT; + adp8870_write(data->client, ADP8870_CFGR, reg_val); + } mutex_unlock(&data->lock); } |