linux-kernel - [git pull] Input updates for 2.6.26-rc8

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Message-ID: <20080630151349.GA19527@anvil.corenet.prv>
Date:	Mon, 30 Jun 2008 11:13:50 -0400
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: [git pull] Input updates for 2.6.26-rc8

Hi Linus,

Please pull from:

	git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git for-linus
or
	master.kernel.org:/pub/scm/linux/kernel/git/dtor/input.git for-linus

to receive updates for the input subsystem. You will get a new keycode
definition and changes to force-feedback core locking that bring it in
sync with the recent locking changes in the input core. While these
locking changes have not been exposed in 'next' I feel they should make
into 2.6.26, because right now FF is simply broken - input_event takes a
spinlock and then calls input_ff_event that tries to take a mutex.

Changelog:
---------

Bastien Nocera (1):
      Input: add KEY_MEDIA_REPEAT definition

Dmitry Torokhov (1):
      Input: fix locking in force-feedback core


Diffstat:
--------

 drivers/input/ff-core.c |   17 +++++++++++------
 include/linux/input.h   |    2 +-
 2 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/drivers/input/ff-core.c b/drivers/input/ff-core.c
index eebc724..4c01464 100644
--- a/drivers/input/ff-core.c
+++ b/drivers/input/ff-core.c
@@ -166,8 +166,10 @@ int input_ff_upload(struct input_dev *dev, struct ff_effect *effect,
 	if (ret)
 		goto out;
 
+	spin_lock_irq(&dev->event_lock);
 	ff->effects[id] = *effect;
 	ff->effect_owners[id] = file;
+	spin_unlock_irq(&dev->event_lock);
 
  out:
 	mutex_unlock(&ff->mutex);
@@ -189,16 +191,22 @@ static int erase_effect(struct input_dev *dev, int effect_id,
 	if (error)
 		return error;
 
+	spin_lock_irq(&dev->event_lock);
 	ff->playback(dev, effect_id, 0);
+	ff->effect_owners[effect_id] = NULL;
+	spin_unlock_irq(&dev->event_lock);
 
 	if (ff->erase) {
 		error = ff->erase(dev, effect_id);
-		if (error)
+		if (error) {
+			spin_lock_irq(&dev->event_lock);
+			ff->effect_owners[effect_id] = file;
+			spin_unlock_irq(&dev->event_lock);
+
 			return error;
+		}
 	}
 
-	ff->effect_owners[effect_id] = NULL;
-
 	return 0;
 }
 
@@ -263,8 +271,6 @@ int input_ff_event(struct input_dev *dev, unsigned int type,
 	if (type != EV_FF)
 		return 0;
 
-	mutex_lock(&ff->mutex);
-
 	switch (code) {
 	case FF_GAIN:
 		if (!test_bit(FF_GAIN, dev->ffbit) || value > 0xffff)
@@ -286,7 +292,6 @@ int input_ff_event(struct input_dev *dev, unsigned int type,
 		break;
 	}
 
-	mutex_unlock(&ff->mutex);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(input_ff_event);
diff --git a/include/linux/input.h b/include/linux/input.h
index e075c4b..d150c57 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -534,8 +534,8 @@ struct input_absinfo {
 
 #define KEY_FRAMEBACK		0x1b4	/* Consumer - transport controls */
 #define KEY_FRAMEFORWARD	0x1b5
-
 #define KEY_CONTEXT_MENU	0x1b6	/* GenDesc - system context menu */
+#define KEY_MEDIA_REPEAT	0x1b7	/* Consumer - transport control */
 
 #define KEY_DEL_EOL		0x1c0
 #define KEY_DEL_EOS		0x1c1


-- 
Dmitry
--
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