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authorLinus Walleij <linus.walleij@linaro.org>2021-05-23 00:50:41 +0200
committerSebastian Reichel <sre@kernel.org>2021-06-03 18:40:15 +0200
commit5bcb5087c9dd3dca1ff0ebd8002c5313c9332b56 (patch)
tree50279bcd7fb85a644fdeb405b1499e356f9b4200 /drivers/power
parent7e2bb83c617f8fccc04db7d03f105a06b9d491a9 (diff)
power: supply: ab8500: Avoid NULL pointers
Sometimes the code will crash because we haven't enabled AC or USB charging and thus not created the corresponding psy device. Fix it by checking that it is there before notifying. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/supply/ab8500_charger.c18
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
index af32cfae9f19..57fbfe3d8c03 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -415,6 +415,14 @@ disable_otp:
static void ab8500_power_supply_changed(struct ab8500_charger *di,
struct power_supply *psy)
{
+ /*
+ * This happens if we get notifications or interrupts and
+ * the platform has been configured not to support one or
+ * other type of charging.
+ */
+ if (!psy)
+ return;
+
if (di->autopower_cfg) {
if (!di->usb.charger_connected &&
!di->ac.charger_connected &&
@@ -441,7 +449,15 @@ static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
if (!connected)
di->flags.vbus_drop_end = false;
- sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, "present");
+ /*
+ * Sometimes the platform is configured not to support
+ * USB charging and no psy has been created, but we still
+ * will get these notifications.
+ */
+ if (di->usb_chg.psy) {
+ sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL,
+ "present");
+ }
if (connected) {
mutex_lock(&di->charger_attached_mutex);