diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2022-02-05 08:40:48 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2022-02-08 08:53:31 +0000 |
| commit | ba9897a0e0cefcff0108d856aa754b953997d920 (patch) | |
| tree | 27ad84640a20f77bee90fe5221f12c135be3f78b | |
| parent | e783362eb54cd99b2cac8b3a9aeac942e6f6ac07 (diff) | |
| download | linux-ba9897a0e0cefcff0108d856aa754b953997d920.tar.bz2 | |
backlight: pwm_bl: Avoid open coded arithmetic in memory allocation
kmalloc_array()/kcalloc() should be used to avoid potential overflow when
a multiplication is needed to compute the size of the requested memory.
So turn a kzalloc()+explicit size computation into an equivalent kcalloc().
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/bd3d74acfa58d59f6f5f81fc5a9fb409edb8d747.1644046817.git.christophe.jaillet@wanadoo.fr
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 8d8959a70e44..c0523a0269ee 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -263,9 +263,8 @@ static int pwm_backlight_parse_dt(struct device *dev, /* read brightness levels from DT property */ if (num_levels > 0) { - size_t size = sizeof(*data->levels) * num_levels; - - data->levels = devm_kzalloc(dev, size, GFP_KERNEL); + data->levels = devm_kcalloc(dev, num_levels, + sizeof(*data->levels), GFP_KERNEL); if (!data->levels) return -ENOMEM; @@ -320,8 +319,8 @@ static int pwm_backlight_parse_dt(struct device *dev, * Create a new table of brightness levels with all the * interpolated steps. */ - size = sizeof(*table) * num_levels; - table = devm_kzalloc(dev, size, GFP_KERNEL); + table = devm_kcalloc(dev, num_levels, sizeof(*table), + GFP_KERNEL); if (!table) return -ENOMEM; /* |