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pwm: Check for out of range pin number in pwm_init()

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Signed-off-by: Henry Bruce <henry.bruce@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>
This commit is contained in:
Henry Bruce
2016-01-21 17:28:42 -08:00
committed by Brendan Le Foll
parent c86fe2a12b
commit 078218f680
1 changed files with 4 additions and 0 deletions
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4
src/pwm/pwm.c
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@@ -186,6 +186,10 @@ mraa_pwm_init(int pin)
syslog(LOG_NOTICE, "pwm: Using sub platform is not supported"); syslog(LOG_NOTICE, "pwm: Using sub platform is not supported");
return NULL; return NULL;
} }
if (pin < 0 || pin > plat->phy_pin_count) {
syslog(LOG_ERR, "pwm: pin %i beyond platform definition", pin);
return NULL;
}
if (plat->pins[pin].capabilites.pwm != 1) { if (plat->pins[pin].capabilites.pwm != 1) {
syslog(LOG_ERR, "pwm: pin not capable of pwm"); syslog(LOG_ERR, "pwm: pin not capable of pwm");
return NULL; return NULL;