linux-kernel - [RFC][PATCH v2 02/13] usb: otg-fsm: support multiple instances

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Message-ID: <1429008120-5395-3-git-send-email-rogerq@ti.com>
Date:	Tue, 14 Apr 2015 13:41:49 +0300
From:	Roger Quadros <rogerq@...com>
To:	<gregkh@...uxfoundation.org>, <balbi@...com>,
	<stern@...land.harvard.edu>
CC:	<dan.j.williams@...el.com>, <peter.chen@...escale.com>,
	<jun.li@...escale.com>, <mathias.nyman@...ux.intel.com>,
	<tony@...mide.com>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	Roger Quadros <rogerq@...com>
Subject: [RFC][PATCH v2 02/13] usb: otg-fsm: support multiple instances

Move the state_changed variable into struct otg_fsm
so that we can support multiple instances.

Signed-off-by: Roger Quadros <rogerq@...com>
---
 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 1736bbe..0caa37b 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;
 	VDBG("Set state: %s\n", usb_otg_state_string(new_state));
@@ -255,7 +253,7 @@ 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) {
@@ -368,7 +366,7 @@ 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 c5b74c5..85a9150 100644
--- a/include/linux/usb/otg-fsm.h
+++ b/include/linux/usb/otg-fsm.h
@@ -183,6 +183,7 @@ 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 {
-- 
2.1.0

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