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

Andres Salomon
2008-09-11T18:32:49Z

On Thu, 11 Sep 2008 09:05:22 -0400
Dmitry Torokhov <dmitry.torokhov@gmail.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@debian.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@debian.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