From f35d77645808d1b890abb1a36260bf228854259e Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 27 Apr 2010 16:24:21 +0200
Subject: cris: push down BKL into some device drivers

A number of cris specific device drivers still use the
locked ->ioctl operation. Convert them to unlocked_ioctl
with explicit lock_kernel calls.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
---
 arch/cris/arch-v32/drivers/i2c.c     | 22 ++++++++++++++--------
 arch/cris/arch-v32/drivers/pcf8563.c | 21 ++++++++++++++++-----
 2 files changed, 30 insertions(+), 13 deletions(-)

(limited to 'arch/cris/arch-v32')

diff --git a/arch/cris/arch-v32/drivers/i2c.c b/arch/cris/arch-v32/drivers/i2c.c
index 506826399ae7..2fd6a740d895 100644
--- a/arch/cris/arch-v32/drivers/i2c.c
+++ b/arch/cris/arch-v32/drivers/i2c.c
@@ -649,10 +649,10 @@ i2c_release(struct inode *inode, struct file *filp)
 /* Main device API. ioctl's to write or read to/from i2c registers.
  */
 
-static int
-i2c_ioctl(struct inode *inode, struct file *file,
-	  unsigned int cmd, unsigned long arg)
+static long
+i2c_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
+	int ret;
 	if(_IOC_TYPE(cmd) != ETRAXI2C_IOCTYPE) {
 		return -ENOTTY;
 	}
@@ -665,9 +665,13 @@ i2c_ioctl(struct inode *inode, struct file *file,
 				 I2C_ARGREG(arg),
 				 I2C_ARGVALUE(arg)));
 
-			return i2c_writereg(I2C_ARGSLAVE(arg),
+			lock_kernel();
+			ret = i2c_writereg(I2C_ARGSLAVE(arg),
 					    I2C_ARGREG(arg),
 					    I2C_ARGVALUE(arg));
+			unlock_kernel();
+			return ret;
+
 		case I2C_READREG:
 		{
 			unsigned char val;
@@ -675,7 +679,9 @@ i2c_ioctl(struct inode *inode, struct file *file,
 			D(printk("i2cr %d %d ",
 				I2C_ARGSLAVE(arg),
 				I2C_ARGREG(arg)));
+			lock_kernel();
 			val = i2c_readreg(I2C_ARGSLAVE(arg), I2C_ARGREG(arg));
+			unlock_kernel();
 			D(printk("= %d\n", val));
 			return val;
 		}
@@ -688,10 +694,10 @@ i2c_ioctl(struct inode *inode, struct file *file,
 }
 
 static const struct file_operations i2c_fops = {
-	.owner =    THIS_MODULE,
-	.ioctl =    i2c_ioctl,
-	.open =     i2c_open,
-	.release =  i2c_release,
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl = i2c_ioctl,
+	.open		= i2c_open,
+	.release	= i2c_release,
 };
 
 static int __init i2c_init(void)
diff --git a/arch/cris/arch-v32/drivers/pcf8563.c b/arch/cris/arch-v32/drivers/pcf8563.c
index f4478506e52c..bef6eb53b153 100644
--- a/arch/cris/arch-v32/drivers/pcf8563.c
+++ b/arch/cris/arch-v32/drivers/pcf8563.c
@@ -24,6 +24,7 @@
 #include <linux/init.h>
 #include <linux/fs.h>
 #include <linux/ioctl.h>
+#include <linux/smp_lock.h>
 #include <linux/delay.h>
 #include <linux/bcd.h>
 #include <linux/mutex.h>
@@ -49,7 +50,7 @@ static DEFINE_MUTEX(rtc_lock); /* Protect state etc */
 static const unsigned char days_in_month[] =
 	{ 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
 
-int pcf8563_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
+static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
 
 /* Cache VL bit value read at driver init since writing the RTC_SECOND
  * register clears the VL status.
@@ -57,8 +58,8 @@ int pcf8563_ioctl(struct inode *, struct file *, unsigned int, unsigned long);
 static int voltage_low;
 
 static const struct file_operations pcf8563_fops = {
-	.owner =	THIS_MODULE,
-	.ioctl =	pcf8563_ioctl
+	.owner		= THIS_MODULE,
+	.unlocked_ioctl = pcf8563_unlocked_ioctl,
 };
 
 unsigned char
@@ -208,8 +209,7 @@ pcf8563_exit(void)
  * ioctl calls for this driver. Why return -ENOTTY upon error? Because
  * POSIX says so!
  */
-int pcf8563_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
-	unsigned long arg)
+static int pcf8563_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	/* Some sanity checks. */
 	if (_IOC_TYPE(cmd) != RTC_MAGIC)
@@ -335,6 +335,17 @@ int pcf8563_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
 	return 0;
 }
 
+static long pcf8563_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	return pcf8563_ioctl(filp, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
+
 static int __init pcf8563_register(void)
 {
 	if (pcf8563_init() < 0) {
-- 
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