From: Dmitry Torokhov <dtor_core@ameritech.net>
To: Vojtech Pavlik <vojtech@suse.cz>
Cc: Andrew Morton <akpm@osdl.org>, linux-kernel@vger.kernel.org
Subject: [PATCH 1/19] psmouse state locking
Date: Mon, 28 Jun 2004 00:09:36 -0500 [thread overview]
Message-ID: <200406280009.37987.dtor_core@ameritech.net> (raw)
In-Reply-To: <200406280008.21465.dtor_core@ameritech.net>
===================================================================
ChangeSet@1.1775, 2004-06-27 15:44:44-05:00, dtor_core@ameritech.net
Input: when changing psmouse state (activated, ignore) do it while
holding serio lock so it will not fight with the interrupt
handler.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
psmouse-base.c | 32 ++++++++++++++++++++++----------
1 files changed, 22 insertions(+), 10 deletions(-)
===================================================================
diff -Nru a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
--- a/drivers/input/mouse/psmouse-base.c 2004-06-27 17:46:50 -05:00
+++ b/drivers/input/mouse/psmouse-base.c 2004-06-27 17:46:50 -05:00
@@ -622,6 +622,23 @@
}
/*
+ * psmouse_set_state() sets new psmouse state and resets all flags and
+ * counters while holding serio lock so fighting with interrupt handler
+ * is not a concern.
+ */
+
+static void psmouse_set_state(struct psmouse *psmouse, unsigned char new_state)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&psmouse->serio->lock, flags);
+ psmouse->state = new_state;
+ psmouse->pktcnt = psmouse->cmdcnt = psmouse->out_of_sync = 0;
+ psmouse->flags = 0;
+ spin_unlock_irqrestore(&psmouse->serio->lock, flags);
+}
+
+/*
* psmouse_activate() enables the mouse so that we get motion reports from it.
*/
@@ -630,7 +647,7 @@
if (psmouse_command(psmouse, NULL, PSMOUSE_CMD_ENABLE))
printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n", psmouse->serio->phys);
- psmouse->state = PSMOUSE_ACTIVATED;
+ psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
}
/*
@@ -652,7 +669,7 @@
{
struct psmouse *psmouse = serio->private;
- psmouse->state = PSMOUSE_CMD_MODE;
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
if (psmouse->ptport) {
if (psmouse->ptport->deactivate)
@@ -665,7 +682,7 @@
if (psmouse->disconnect)
psmouse->disconnect(psmouse);
- psmouse->state = PSMOUSE_IGNORE;
+ psmouse_set_state(psmouse, PSMOUSE_IGNORE);
input_unregister_device(&psmouse->dev);
serio_close(serio);
@@ -693,9 +710,9 @@
psmouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
psmouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
- psmouse->state = PSMOUSE_CMD_MODE;
psmouse->serio = serio;
psmouse->dev.private = psmouse;
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
serio->private = psmouse;
if (serio_open(serio, dev)) {
@@ -758,12 +775,7 @@
return -1;
}
- psmouse->state = PSMOUSE_CMD_MODE;
-
- clear_bit(PSMOUSE_FLAG_ACK, &psmouse->flags);
- clear_bit(PSMOUSE_FLAG_CMD, &psmouse->flags);
-
- psmouse->pktcnt = psmouse->out_of_sync = 0;
+ psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
if (psmouse->reconnect) {
if (psmouse->reconnect(psmouse))
next prev parent reply other threads:[~2004-06-28 5:09 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-06-28 5:08 [PATCH 0/19] New set of input patches Dmitry Torokhov
2004-06-28 5:09 ` Dmitry Torokhov [this message]
2004-06-28 5:10 ` [PATCH 2/19] serio connect/disconnect mandatory Dmitry Torokhov
2004-06-28 5:11 ` [PATCH 3/19] serio renames 1 Dmitry Torokhov
2004-06-28 5:12 ` [PATCH 4/19] serio renames 2 Dmitry Torokhov
2004-06-28 5:13 ` [PATCH 5/19] serio dynamic allocation Dmitry Torokhov
2004-06-28 5:14 ` [PATCH 6/19] serio avoid recursion Dmitry Torokhov
2004-06-28 5:15 ` [PATCH 7/19] serio sysfs intergration Dmitry Torokhov
2004-06-28 5:16 ` [PATCH 8/19] serio rebind Dmitry Torokhov
2004-06-28 5:17 ` PATCH 9/19] serio manual bind Dmitry Torokhov
2004-06-28 5:17 ` [PATCH 10/19] serio_raw driver Dmitry Torokhov
2004-06-28 5:19 ` [PATCH 11/19] add platform_device_register_simple Dmitry Torokhov
2004-06-28 5:19 ` [PATCH 12/19] convert i8042 into a platform device Dmitry Torokhov
2004-06-28 5:21 ` [PATCH 13/19] more platform device conversions Dmitry Torokhov
2004-06-28 5:22 ` [PATCH 14/19] bind serio ports and their parents Dmitry Torokhov
2004-06-28 5:23 ` [PATCH 15/19] synaptics passthrough handling Dmitry Torokhov
2004-06-28 5:24 ` [PATCH 16/19] add bus' default driver attributes Dmitry Torokhov
2004-06-28 5:25 ` [PATCH 17/19] serio use bus' default driver/device attributes Dmitry Torokhov
2004-06-28 5:26 ` [PATCH 18/19] add driver_find Dmitry Torokhov
2004-06-28 5:27 ` [PATCH 19/19] serio use driver_find Dmitry Torokhov
2004-06-28 6:52 ` [PATCH 0/19] New set of input patches Vojtech Pavlik
2004-06-28 7:13 ` Dmitry Torokhov
2004-06-28 7:51 ` Vojtech Pavlik
2004-06-28 10:32 ` Neil Brown
2004-06-28 12:13 ` Vojtech Pavlik
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