diff options
| author | Milo Kim <milo.kim@ti.com> | 2013-12-02 17:21:44 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-15 15:31:42 -0800 |
| commit | ac4de081312a65427e847157f46ea35cab2d7b82 (patch) | |
| tree | 5f67bc98bb82fe2a46aa190412a5f79707e0825b | |
| parent | 778b3b76c34292c7d27aa0faad5c9026a2cacf43 (diff) | |
leds: lp5521/5523: Remove duplicate mutex
commit e70988d1aaf73221355e06125c9937bd4b27761c upstream.
It can be a problem when a pattern is loaded via the firmware interface.
LP55xx common driver has already locked the mutex in 'lp55xx_firmware_loaded()'.
So it should be deleted.
On the other hand, locks are required in store_engine_load()
on updating program memory.
Reported-by: Pali Rohár <pali.rohar@gmail.com>
Reported-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/leds/leds-lp5521.c | 12 | ||||
| -rw-r--r-- | drivers/leds/leds-lp5523.c | 12 |
2 files changed, 8 insertions, 16 deletions
diff --git a/drivers/leds/leds-lp5521.c b/drivers/leds/leds-lp5521.c index 05188351711d..a97263e902ff 100644 --- a/drivers/leds/leds-lp5521.c +++ b/drivers/leds/leds-lp5521.c @@ -244,18 +244,12 @@ static int lp5521_update_program_memory(struct lp55xx_chip *chip, if (i % 2) goto err; - mutex_lock(&chip->lock); - for (i = 0; i < LP5521_PROGRAM_LENGTH; i++) { ret = lp55xx_write(chip, addr[idx] + i, pattern[i]); - if (ret) { - mutex_unlock(&chip->lock); + if (ret) return -EINVAL; - } } - mutex_unlock(&chip->lock); - return size; err: @@ -427,15 +421,17 @@ static ssize_t store_engine_load(struct device *dev, { struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); struct lp55xx_chip *chip = led->chip; + int ret; mutex_lock(&chip->lock); chip->engine_idx = nr; lp5521_load_engine(chip); + ret = lp5521_update_program_memory(chip, buf, len); mutex_unlock(&chip->lock); - return lp5521_update_program_memory(chip, buf, len); + return ret; } store_load(1) store_load(2) diff --git a/drivers/leds/leds-lp5523.c b/drivers/leds/leds-lp5523.c index fe3bcbb5747f..f382fc1e57a0 100644 --- a/drivers/leds/leds-lp5523.c +++ b/drivers/leds/leds-lp5523.c @@ -336,18 +336,12 @@ static int lp5523_update_program_memory(struct lp55xx_chip *chip, if (i % 2) goto err; - mutex_lock(&chip->lock); - for (i = 0; i < LP5523_PROGRAM_LENGTH; i++) { ret = lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]); - if (ret) { - mutex_unlock(&chip->lock); + if (ret) return -EINVAL; - } } - mutex_unlock(&chip->lock); - return size; err: @@ -547,15 +541,17 @@ static ssize_t store_engine_load(struct device *dev, { struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); struct lp55xx_chip *chip = led->chip; + int ret; mutex_lock(&chip->lock); chip->engine_idx = nr; lp5523_load_engine_and_select_page(chip); + ret = lp5523_update_program_memory(chip, buf, len); mutex_unlock(&chip->lock); - return lp5523_update_program_memory(chip, buf, len); + return ret; } store_load(1) store_load(2) |