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authorJonghwa Lee <jonghwa3.lee@samsung.com>2013-06-25 14:02:49 +0900
committerAnton Vorontsov <anton@enomsg.org>2013-06-28 18:35:49 -0700
commit3cc9d26966ea02f71258ab0553ebd3388f40533a (patch)
tree4a4253d83e24966a176bf399a9ac46ec1e351343 /drivers/power/charger-manager.c
parent605860bc2495cd584fd639f00806591af0b1fefa (diff)
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>
Diffstat (limited to 'drivers/power/charger-manager.c')
-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);