diff options
Diffstat (limited to 'common/usb_pd_dual_role.c')
| -rw-r--r-- | common/usb_pd_dual_role.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/common/usb_pd_dual_role.c b/common/usb_pd_dual_role.c index 3981353101..52042c5439 100644 --- a/common/usb_pd_dual_role.c +++ b/common/usb_pd_dual_role.c @@ -15,6 +15,9 @@ #define CPRINTS(format, args...) cprints(CC_USBPD, format, ## args) +/* The macro is used to prevent a DBZ exception while decoding PDOs. */ +#define PROCESS_ZERO_DIVISOR(x) ((x) == 0 ? 1 : (x)) + #if defined(PD_MAX_VOLTAGE_MV) && defined(PD_OPERATING_POWER_MW) /* * As a sink, this is the max voltage (in millivolts) we can request @@ -192,9 +195,10 @@ void pd_extract_pdo_power(uint32_t pdo, uint32_t *ma, uint32_t *max_mv, max_ma = PDO_VAR_MAX_CURRENT(pdo); } else { mw = PDO_BATT_MAX_POWER(pdo); - max_ma = 1000 * mw / *min_mv; + max_ma = 1000 * mw / PROCESS_ZERO_DIVISOR(*min_mv); } - max_ma = MIN(max_ma, PD_MAX_POWER_MW * 1000 / *min_mv); + max_ma = MIN(max_ma, + PD_MAX_POWER_MW * 1000 / PROCESS_ZERO_DIVISOR(*min_mv)); *ma = MIN(max_ma, PD_MAX_CURRENT_MA); } |