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Avoid setting speed when already set to that speed

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This commit is contained in:
Andrew Gaul 2017-07-14 02:30:59 -07:00
parent ac099c8bd2
commit e58a67f630
2 changed files with 4 additions and 1 deletions
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1
src/global.h
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@ -19,6 +19,7 @@ struct s_fans {
char* path; // TODO: unused
char* fan_output_path;
char* fan_manual_path;
int old_speed;
struct s_fans *next;
};

4
src/mbpfan.c
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@ -272,6 +272,7 @@ t_fans *retrieve_fans()
fan = (t_fans *) malloc( sizeof( t_fans ) );
fan->fan_output_path = strdup(path_output);
fan->fan_manual_path = strdup(path_manual);
fan->old_speed = 0;
if (fans_head == NULL) {
fans_head = fan;
@ -373,13 +374,14 @@ void set_fan_speed(t_fans* fans, int speed)
t_fans *tmp = fans;
while(tmp != NULL) {
if(tmp->file != NULL) {
if(tmp->file != NULL && tmp->old_speed != speed) {
char buf[16];
int len = snprintf(buf, sizeof(buf), "%d", speed);
int res = pwrite(fileno(tmp->file), buf, len, /*offset=*/ 0);
if (res == -1) {
perror("Could not set fan speed");
}
tmp->old_speed = speed;
}
tmp = tmp->next;