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authorKim, Milo <Milo.Kim@ti.com>2012-08-31 09:23:12 +0000
committerAnton Vorontsov <anton.vorontsov@linaro.org>2012-09-20 17:56:49 -0700
commit318cb389d020e3107979d7d794ab992e4bcd6665 (patch)
treea1d4c51931e22d78abcf5a7b0217e6b5a73c589d /drivers/power
parentfb9adc5190d7605506ebc0e05351baa57365cc90 (diff)
downloadop-kernel-dev-318cb389d020e3107979d7d794ab992e4bcd6665.zip
op-kernel-dev-318cb389d020e3107979d7d794ab992e4bcd6665.tar.gz
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>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/lp8727_charger.c28
1 files changed, 21 insertions, 7 deletions
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_ctrl_switch(struct lp8727_chg *pchg, u8 sw)
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 @@ static int lp8727_battery_get_property(struct power_supply *psy,
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 @@ static int lp8727_battery_get_property(struct power_supply *psy,
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:
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