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usb: phy: Check OTG FSM callback existance in helper functions

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Existence of callback must be checked to avoid NULL pointer
dereferncing.

Signed-off-by: Anton Tikhomirov <av.tikhomirov@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Anton Tikhomirov 2013-10-03 12:42:04 +09:00 committed by Felipe Balbi
parent da8cc16724
commit 737cc66eac
1 changed files with 28 additions and 7 deletions
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35
drivers/usb/phy/phy-fsm-usb.h
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@ -95,48 +95,69 @@ struct otg_fsm_ops {
};
static inline void otg_chrg_vbus(struct otg_fsm *fsm, int on)
static inline int otg_chrg_vbus(struct otg_fsm *fsm, int on)
{
if (!fsm->ops->chrg_vbus)
return -EOPNOTSUPP;
fsm->ops->chrg_vbus(fsm, on);
return 0;
}
static inline void otg_drv_vbus(struct otg_fsm *fsm, int on)
static inline int otg_drv_vbus(struct otg_fsm *fsm, int on)
{
if (!fsm->ops->drv_vbus)
return -EOPNOTSUPP;
if (fsm->drv_vbus != on) {
fsm->drv_vbus = on;
fsm->ops->drv_vbus(fsm, on);
}
return 0;
}
static inline void otg_loc_conn(struct otg_fsm *fsm, int on)
static inline int otg_loc_conn(struct otg_fsm *fsm, int on)
{
if (!fsm->ops->loc_conn)
return -EOPNOTSUPP;
if (fsm->loc_conn != on) {
fsm->loc_conn = on;
fsm->ops->loc_conn(fsm, on);
}
return 0;
}
static inline void otg_loc_sof(struct otg_fsm *fsm, int on)
static inline int otg_loc_sof(struct otg_fsm *fsm, int on)
{
if (!fsm->ops->loc_sof)
return -EOPNOTSUPP;
if (fsm->loc_sof != on) {
fsm->loc_sof = on;
fsm->ops->loc_sof(fsm, on);
}
return 0;
}
static inline void otg_start_pulse(struct otg_fsm *fsm)
static inline int otg_start_pulse(struct otg_fsm *fsm)
{
if (!fsm->ops->start_pulse)
return -EOPNOTSUPP;
fsm->ops->start_pulse(fsm);
return 0;
}
static inline void otg_add_timer(struct otg_fsm *fsm, void *timer)
static inline int otg_add_timer(struct otg_fsm *fsm, void *timer)
{
if (!fsm->ops->add_timer)
return -EOPNOTSUPP;
fsm->ops->add_timer(fsm, timer);
return 0;
}
static inline void otg_del_timer(struct otg_fsm *fsm, void *timer)
static inline int otg_del_timer(struct otg_fsm *fsm, void *timer)
{
if (!fsm->ops->del_timer)
return -EOPNOTSUPP;
fsm->ops->del_timer(fsm, timer);
return 0;
}
int otg_statemachine(struct otg_fsm *fsm);