linux-kernel - [PATCH] lirc: use unlocked

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Date:	Fri, 9 Jul 2010 23:35:39 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Jarod Wilson <jarod@...hat.com>
Cc:	Mauro Carvalho Chehab <mchehab@...hat.com>,
	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: [PATCH] lirc: use unlocked_ioctl

New code should not rely on the big kernel lock,
so use the unlocked_ioctl file operation in lirc.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
The lirc code currently conflicts with my removal of the .ioctl
operation, which I'd like to get into linux-next.

 drivers/media/IR/ir-lirc-codec.c |    7 +++----
 drivers/media/IR/lirc_dev.c      |   12 ++++++------
 drivers/media/IR/lirc_dev.h      |    3 +--
 3 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/media/IR/ir-lirc-codec.c b/drivers/media/IR/ir-lirc-codec.c
index aff31d1..178bc5b 100644
--- a/drivers/media/IR/ir-lirc-codec.c
+++ b/drivers/media/IR/ir-lirc-codec.c
@@ -97,8 +97,7 @@ out:
 	return ret;
 }
 
-static int ir_lirc_ioctl(struct inode *node, struct file *filep,
-			 unsigned int cmd, unsigned long arg)
+static long ir_lirc_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
 {
 	struct lirc_codec *lirc;
 	struct ir_input_dev *ir_dev;
@@ -154,7 +153,7 @@ static int ir_lirc_ioctl(struct inode *node, struct file *filep,
 		break;
 
 	default:
-		return lirc_dev_fop_ioctl(node, filep, cmd, arg);
+		return lirc_dev_fop_ioctl(filep, cmd, arg);
 	}
 
 	return ret;
@@ -173,7 +172,7 @@ static void ir_lirc_close(void *data)
 static struct file_operations lirc_fops = {
 	.owner		= THIS_MODULE,
 	.write		= ir_lirc_transmit_ir,
-	.ioctl		= ir_lirc_ioctl,
+	.unlocked_ioctl	= ir_lirc_ioctl,
 	.read		= lirc_dev_fop_read,
 	.poll		= lirc_dev_fop_poll,
 	.open		= lirc_dev_fop_open,
diff --git a/drivers/media/IR/lirc_dev.c b/drivers/media/IR/lirc_dev.c
index 9e141d5..3fd6150 100644
--- a/drivers/media/IR/lirc_dev.c
+++ b/drivers/media/IR/lirc_dev.c
@@ -160,7 +160,7 @@ static struct file_operations fops = {
 	.read		= lirc_dev_fop_read,
 	.write		= lirc_dev_fop_write,
 	.poll		= lirc_dev_fop_poll,
-	.ioctl		= lirc_dev_fop_ioctl,
+	.unlocked_ioctl	= lirc_dev_fop_ioctl,
 	.open		= lirc_dev_fop_open,
 	.release	= lirc_dev_fop_close,
 };
@@ -242,9 +242,9 @@ int lirc_register_driver(struct lirc_driver *d)
 		goto out;
 	} else if (!d->rbuf) {
 		if (!(d->fops && d->fops->read && d->fops->poll &&
-		      d->fops->ioctl)) {
+		      d->fops->unlocked_ioctl)) {
 			dev_err(d->dev, "lirc_dev: lirc_register_driver: "
-				"neither read, poll nor ioctl can be NULL!\n");
+				"neither read, poll nor unlocked_ioctl can be NULL!\n");
 			err = -EBADRQC;
 			goto out;
 		}
@@ -425,6 +425,7 @@ int lirc_dev_fop_open(struct inode *inode, struct file *file)
 		retval = -ENODEV;
 		goto error;
 	}
+	file->private_data = ir;
 
 	dev_dbg(ir->d.dev, LOGHEAD "open called\n", ir->d.name, ir->d.minor);
 
@@ -516,12 +517,11 @@ unsigned int lirc_dev_fop_poll(struct file *file, poll_table *wait)
 }
 EXPORT_SYMBOL(lirc_dev_fop_poll);
 
-int lirc_dev_fop_ioctl(struct inode *inode, struct file *file,
-		       unsigned int cmd, unsigned long arg)
+long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	unsigned long mode;
 	int result = 0;
-	struct irctl *ir = irctls[iminor(inode)];
+	struct irctl *ir = file->private_data;
 
 	dev_dbg(ir->d.dev, LOGHEAD "ioctl called (0x%x)\n",
 		ir->d.name, ir->d.minor, cmd);
diff --git a/drivers/media/IR/lirc_dev.h b/drivers/media/IR/lirc_dev.h
index 4afd96a..b1f6066 100644
--- a/drivers/media/IR/lirc_dev.h
+++ b/drivers/media/IR/lirc_dev.h
@@ -216,8 +216,7 @@ void *lirc_get_pdata(struct file *file);
 int lirc_dev_fop_open(struct inode *inode, struct file *file);
 int lirc_dev_fop_close(struct inode *inode, struct file *file);
 unsigned int lirc_dev_fop_poll(struct file *file, poll_table *wait);
-int lirc_dev_fop_ioctl(struct inode *inode, struct file *file,
-		       unsigned int cmd, unsigned long arg);
+long lirc_dev_fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 ssize_t lirc_dev_fop_read(struct file *file, char *buffer, size_t length,
 			  loff_t *ppos);
 ssize_t lirc_dev_fop_write(struct file *file, const char *buffer, size_t length,
-- 
1.7.1

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