On Wed, Jul 08, 2015 at 01:19:28PM +0300, Roger Quadros wrote:
> Move the state_changed variable into struct otg_fsm
> so that we can support multiple instances.
>
I am not sure if multiple instances may happen since OTG protocol requires
only one OTG port can be equipped on OTG device.
Li Jun
> Signed-off-by: Roger Quadros <rogerq@xxxxxx>
> ---
> drivers/usb/common/usb-otg-fsm.c | 10 ++++------
> include/linux/usb/otg-fsm.h | 1 +
> 2 files changed, 5 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/usb/common/usb-otg-fsm.c b/drivers/usb/common/usb-otg-fsm.c
> index 61d538a..42c6376 100644
> --- a/drivers/usb/common/usb-otg-fsm.c
> +++ b/drivers/usb/common/usb-otg-fsm.c
> @@ -61,8 +61,6 @@ static int otg_set_protocol(struct otg_fsm *fsm, int protocol)
> return 0;
> }
>
> -static int state_changed;
> -
> /* Called when leaving a state. Do state clean up jobs here */
> static void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
> {
> @@ -123,7 +121,7 @@ static void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
> /* Called when entering a state */
> static int otg_set_state(struct otg_fsm *fsm, enum usb_otg_state new_state)
> {
> - state_changed = 1;
> + fsm->state_changed = 1;
> if (fsm->otg->state == new_state)
> return 0;
"fsm->state_changed = 1;" should be put here, I think.
Li Jun
> VDBG("Set state: %s\n", usb_otg_state_string(new_state));
> @@ -248,7 +246,7 @@ int otg_statemachine(struct otg_fsm *fsm)
> mutex_lock(&fsm->lock);
>
> state = fsm->otg->state;
> - state_changed = 0;
> + fsm->state_changed = 0;
> /* State machine state change judgement */
>
> switch (state) {
> @@ -361,7 +359,7 @@ int otg_statemachine(struct otg_fsm *fsm)
> }
> mutex_unlock(&fsm->lock);
>
> - VDBG("quit statemachine, changed = %d\n", state_changed);
> - return state_changed;
> + VDBG("quit statemachine, changed = %d\n", fsm->state_changed);
> + return fsm->state_changed;
> }
> EXPORT_SYMBOL_GPL(otg_statemachine);
> diff --git a/include/linux/usb/otg-fsm.h b/include/linux/usb/otg-fsm.h
> index ca508c2..243274f 100644
> --- a/include/linux/usb/otg-fsm.h
> +++ b/include/linux/usb/otg-fsm.h
> @@ -194,6 +194,7 @@ struct otg_fsm {
> /* Current usb protocol used: 0:undefine; 1:host; 2:client */
> int protocol;
> struct mutex lock;
> + bool state_changed;
> };
>
> struct otg_fsm_ops {
> --
> 2.1.4
>
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