lp8727_charger: Fix buggy code of NULL pdata
LP8727 platform data is optional, so the driver should work even the
platform data is NULL.
To check the platform data, charging parameter data should be changed to
the pointer type.
Fix NULL point access problem when getting the battery properties. When
the data is NULL, just return as invalid value.
Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
diff --git a/drivers/power/lp8727_charger.c b/drivers/power/lp8727_charger.c
index b2df114..7c19c09 100644
--- a/drivers/power/lp8727_charger.c
+++ b/drivers/power/lp8727_charger.c
@@ -170,20 +170,21 @@
static void lp8727_id_detection(struct lp8727_chg *pchg, u8 id, int vbusin)
{
+ struct lp8727_platform_data *pdata = pchg->pdata;
u8 devid = ID_NONE;
u8 swctrl = SW_DM1_HiZ | SW_DP2_HiZ;
switch (id) {
case 0x5:
devid = ID_TA;
- pchg->chg_parm = &pchg->pdata->ac;
+ pchg->chg_parm = pdata ? pdata->ac : NULL;
break;
case 0xB:
if (lp8727_is_dedicated_charger(pchg)) {
- pchg->chg_parm = &pchg->pdata->ac;
+ pchg->chg_parm = pdata ? pdata->ac : NULL;
devid = ID_DEDICATED_CHG;
} else if (lp8727_is_usb_charger(pchg)) {
- pchg->chg_parm = &pchg->pdata->usb;
+ pchg->chg_parm = pdata ? pdata->usb : NULL;
devid = ID_USB_CHG;
swctrl = SW_DM1_DM | SW_DP2_DP;
} else if (vbusin) {
@@ -295,6 +296,7 @@
union power_supply_propval *val)
{
struct lp8727_chg *pchg = dev_get_drvdata(psy->dev->parent);
+ struct lp8727_platform_data *pdata = pchg->pdata;
u8 read;
switch (psp) {
@@ -318,19 +320,31 @@
val->intval = POWER_SUPPLY_HEALTH_GOOD;
break;
case POWER_SUPPLY_PROP_PRESENT:
- if (pchg->pdata->get_batt_present)
+ if (!pdata)
+ return -EINVAL;
+
+ if (pdata->get_batt_present)
val->intval = pchg->pdata->get_batt_present();
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- if (pchg->pdata->get_batt_level)
+ if (!pdata)
+ return -EINVAL;
+
+ if (pdata->get_batt_level)
val->intval = pchg->pdata->get_batt_level();
break;
case POWER_SUPPLY_PROP_CAPACITY:
- if (pchg->pdata->get_batt_capacity)
+ if (!pdata)
+ return -EINVAL;
+
+ if (pdata->get_batt_capacity)
val->intval = pchg->pdata->get_batt_capacity();
break;
case POWER_SUPPLY_PROP_TEMP:
- if (pchg->pdata->get_batt_temp)
+ if (!pdata)
+ return -EINVAL;
+
+ if (pdata->get_batt_temp)
val->intval = pchg->pdata->get_batt_temp();
break;
default: