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authorJonghwa Lee <jonghwa3.lee@samsung.com>2013-06-25 07:02:49 +0200
committerAnton Vorontsov <anton@enomsg.org>2013-06-29 03:35:49 +0200
commit3cc9d26966ea02f71258ab0553ebd3388f40533a (patch)
tree4a4253d83e24966a176bf399a9ac46ec1e351343
parenttps65090-charger: Add dt node to power_supply (diff)
downloadlinux-3cc9d26966ea02f71258ab0553ebd3388f40533a.tar.xz
linux-3cc9d26966ea02f71258ab0553ebd3388f40533a.zip
charger-manager: Fix a bug when it unregisters notifier block of extcon
This patch prevents NULL pointer error cauesed by unregistering unregistered exton notifier block. At the probing time of charger manager, it tries to remove extcon notifier block when it fails to initialize them. It has to be applied for only registered one. Otherwise, it'd make kernel panic. To make it work right, it checks extcon_specific_cable_nb's extcon_dev node. If extcon cable notifier block was registered successfully, it has proper extcon_dev pointer if not so it has NULL pointer. Signed-off-by: Jonghwa Lee <jonghwa3.lee@samsung.com> Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Anton Vorontsov <anton@enomsg.org>
-rw-r--r--drivers/power/charger-manager.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index ba420292628e..8ad9698b55a9 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -1666,7 +1666,9 @@ err_reg_extcon:
charger = &desc->charger_regulators[i];
for (j = 0; j < charger->num_cables; j++) {
struct charger_cable *cable = &charger->cables[j];
- extcon_unregister_interest(&cable->extcon_dev);
+ /* Remove notifier block if only edev exists */
+ if (cable->extcon_dev.edev)
+ extcon_unregister_interest(&cable->extcon_dev);
}
regulator_put(desc->charger_regulators[i].consumer);