linux-kernel - Re: [PATCH 3/3] OLPC: touchpad driver (take 2)

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Date:	Thu, 11 Sep 2008 14:32:16 -0400
From:	Andres Salomon <dilinger@...ued.net>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] OLPC: touchpad driver (take 2)

On Thu, 11 Sep 2008 09:05:22 -0400
Dmitry Torokhov <dmitry.torokhov@...il.com> wrote:

> On Thu, Sep 11, 2008 at 01:32:09AM -0400, Andres Salomon wrote:
> > 
> > And here's the current touchpad driver after updating based upon
> > your comments.
> > 
> 
> Looks good. Care to respin it all thogether based on the attribute
> change I requested so I can be sure I'm applying the latest version of
> everything? Ummm....
> 

Here's the patch.  This is on top of the other 2 psmouse patches that
were previously sent.




From: Andres Salomon <dilinger@...ian.org>
Subject: [PATCH] psmouse: tweak PSMOUSE_DEFINE_ATTR to support raw set callbacks

We want to support attr->set callbacks that may need psmouse->state to
not be updated, or may want to manually deal w/ enabling and disabling
the device.  To do that, we create __PSMOUSE_DEFINE_ATTR which enables
us to set a 'protect' argument specifying whether or not the set
callback should be protected with psmouse_disable and state setting.

Signed-off-by: Andres Salomon <dilinger@...ian.org>
---
 drivers/input/mouse/psmouse-base.c |   30 +++++++++++++++++-------------
 drivers/input/mouse/psmouse.h      |    7 ++++++-
 2 files changed, 23 insertions(+), 14 deletions(-)

diff --git a/drivers/input/mouse/psmouse-base.c b/drivers/input/mouse/psmouse-base.c
index 488ba95..f7278e6 100644
--- a/drivers/input/mouse/psmouse-base.c
+++ b/drivers/input/mouse/psmouse-base.c
@@ -1401,25 +1401,29 @@ ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *dev
 
 	psmouse = serio_get_drvdata(serio);
 
-	if (psmouse->state == PSMOUSE_IGNORE) {
-		retval = -ENODEV;
-		goto out_unlock;
-	}
+	if (attr->protect) {
+		if (psmouse->state == PSMOUSE_IGNORE) {
+			retval = -ENODEV;
+			goto out_unlock;
+		}
 
-	if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
-		parent = serio_get_drvdata(serio->parent);
-		psmouse_deactivate(parent);
-	}
+		if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
+			parent = serio_get_drvdata(serio->parent);
+			psmouse_deactivate(parent);
+		}
 
-	psmouse_deactivate(psmouse);
+		psmouse_deactivate(psmouse);
+	}
 
 	retval = attr->set(psmouse, attr->data, buf, count);
 
-	if (retval != -ENODEV)
-		psmouse_activate(psmouse);
+	if (attr->protect) {
+		if (retval != -ENODEV)
+			psmouse_activate(psmouse);
 
-	if (parent)
-		psmouse_activate(parent);
+		if (parent)
+			psmouse_activate(parent);
+	}
 
  out_unlock:
 	mutex_unlock(&psmouse_mutex);
diff --git a/drivers/input/mouse/psmouse.h b/drivers/input/mouse/psmouse.h
index 48e0112..0f13c1b 100644
--- a/drivers/input/mouse/psmouse.h
+++ b/drivers/input/mouse/psmouse.h
@@ -106,6 +106,7 @@ struct psmouse_attribute {
 	ssize_t (*show)(struct psmouse *psmouse, void *data, char *buf);
 	ssize_t (*set)(struct psmouse *psmouse, void *data,
 			const char *buf, size_t count);
+	int protect;
 };
 #define to_psmouse_attr(a)	container_of((a), struct psmouse_attribute, dattr)
 
@@ -114,7 +115,7 @@ ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *at
 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *attr,
 				const char *buf, size_t count);
 
-#define PSMOUSE_DEFINE_ATTR(_name, _mode, _data, _show, _set)			\
+#define __PSMOUSE_DEFINE_ATTR(_name, _mode, _data, _show, _set, _protect)	\
 static ssize_t _show(struct psmouse *, void *data, char *);			\
 static ssize_t _set(struct psmouse *, void *data, const char *, size_t);	\
 static struct psmouse_attribute psmouse_attr_##_name = {			\
@@ -129,6 +130,10 @@ static struct psmouse_attribute psmouse_attr_##_name = {			\
 	.data	= _data,							\
 	.show	= _show,							\
 	.set	= _set,								\
+	.protect = _protect,							\
 }
 
+#define PSMOUSE_DEFINE_ATTR(_name, _mode, _data, _show, _set)	\
+		__PSMOUSE_DEFINE_ATTR(_name, _mode, _data, _show, _set, 1)
+
 #endif /* _PSMOUSE_H */
-- 
1.5.6.5

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