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| author | Kim, Milo <Milo.Kim@ti.com> | 2012-08-31 09:23:12 +0000 |
|---|---|---|
| committer | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-09-20 17:56:49 -0700 |
| commit | 318cb389d020e3107979d7d794ab992e4bcd6665 (patch) | |
| tree | a1d4c51931e22d78abcf5a7b0217e6b5a73c589d /drivers/power | |
| parent | fb9adc5190d7605506ebc0e05351baa57365cc90 (diff) | |
| download | linux-318cb389d020e3107979d7d794ab992e4bcd6665.tar.gz linux-318cb389d020e3107979d7d794ab992e4bcd6665.tar.bz2 linux-318cb389d020e3107979d7d794ab992e4bcd6665.zip | |
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.c | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/drivers/power/lp8727_charger.c b/drivers/power/lp8727_charger.c index b2df11458d98..7c19c0927f3a 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: |