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backlight: pwm_bl: Fix uninitialized variable

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Currently, if the DT does not define num-interpolated-steps then
num_steps is undefined and the interpolation code will deploy randomly.
Fix with a simple initialize to zero.

Fixes: 573fe6d1c2 ("backlight: pwm_bl: Linear interpolation between brightness-levels")
Reported-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Daniel Thompson 2018-07-25 08:38:30 +01:00 committed by Lee Jones
parent 858c5dfc8c
commit 633786736e
1 changed files with 1 additions and 1 deletions
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2
drivers/video/backlight/pwm_bl.c
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@ -250,7 +250,7 @@ static int pwm_backlight_parse_dt(struct device *dev,
struct device_node *node = dev->of_node; struct device_node *node = dev->of_node;
unsigned int num_levels = 0; unsigned int num_levels = 0;
unsigned int levels_count; unsigned int levels_count;
unsigned int num_steps; unsigned int num_steps = 0;
struct property *prop; struct property *prop;
unsigned int *table; unsigned int *table;
int length; int length;