From b1f2ac07636aadee5cb077fc7e830908b00fcaae Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 27 Apr 2010 20:15:07 +0200
Subject: [PATCH] Staging: push down BKL into ioctl functions

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/staging/crystalhd/crystalhd_lnx.c | 13 ++++++++----
 drivers/staging/dt3155/dt3155_drv.c       | 24 +++++++++++++++++------
 drivers/staging/vme/devices/vme_user.c    | 18 ++++++++++++++---
 3 files changed, 42 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/crystalhd/crystalhd_lnx.c b/drivers/staging/crystalhd/crystalhd_lnx.c
index 58fd91af091..6090a1d5954 100644
--- a/drivers/staging/crystalhd/crystalhd_lnx.c
+++ b/drivers/staging/crystalhd/crystalhd_lnx.c
@@ -16,6 +16,7 @@
 ***************************************************************************/
 
 #include <linux/version.h>
+#include <linux/smp_lock.h>
 #include <linux/slab.h>
 
 #include "crystalhd_lnx.h"
@@ -261,12 +262,12 @@ static int chd_dec_api_cmd(struct crystalhd_adp *adp, unsigned long ua,
 }
 
 /* API interfaces */
-static int chd_dec_ioctl(struct inode *in, struct file *fd,
-			 unsigned int cmd, unsigned long ua)
+static long chd_dec_ioctl(struct file *fd, unsigned int cmd, unsigned long ua)
 {
 	struct crystalhd_adp *adp = chd_get_adp();
 	crystalhd_cmd_proc cproc;
 	struct crystalhd_user *uc;
+	int ret;
 
 	if (!adp || !fd) {
 		BCMLOG_ERR("Invalid adp\n");
@@ -279,13 +280,17 @@ static int chd_dec_ioctl(struct inode *in, struct file *fd,
 		return -ENODATA;
 	}
 
+	lock_kernel();
 	cproc = crystalhd_get_cmd_proc(&adp->cmds, cmd, uc);
 	if (!cproc) {
 		BCMLOG_ERR("Unhandled command: %d\n", cmd);
+		unlock_kernel();
 		return -EINVAL;
 	}
 
-	return chd_dec_api_cmd(adp, ua, uc->uid, cmd, cproc);
+	ret = chd_dec_api_cmd(adp, ua, uc->uid, cmd, cproc);
+	unlock_kernel();
+	return ret;
 }
 
 static int chd_dec_open(struct inode *in, struct file *fd)
@@ -345,7 +350,7 @@ static int chd_dec_close(struct inode *in, struct file *fd)
 
 static const struct file_operations chd_dec_fops = {
 	.owner   = THIS_MODULE,
-	.ioctl   = chd_dec_ioctl,
+	.unlocked_ioctl = chd_dec_ioctl,
 	.open    = chd_dec_open,
 	.release = chd_dec_close,
 };
diff --git a/drivers/staging/dt3155/dt3155_drv.c b/drivers/staging/dt3155/dt3155_drv.c
index e2c44ec6fc4..7e6095f43f1 100644
--- a/drivers/staging/dt3155/dt3155_drv.c
+++ b/drivers/staging/dt3155/dt3155_drv.c
@@ -63,6 +63,7 @@ extern void printques(int);
 #include <linux/types.h>
 #include <linux/poll.h>
 #include <linux/sched.h>
+#include <linux/smp_lock.h>
 
 #include <asm/io.h>
 #include <asm/uaccess.h>
@@ -835,6 +836,17 @@ static unsigned int dt3155_poll (struct file * filp, poll_table *wait)
   return 0;
 }
 
+static long
+dt3155_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	ret = dt3155_ioctl(file->f_path.dentry->d_inode, file, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
 
 /*****************************************************
  * file operations supported by DT3155 driver
@@ -842,12 +854,12 @@ static unsigned int dt3155_poll (struct file * filp, poll_table *wait)
  *  register_chrdev
  *****************************************************/
 static struct file_operations dt3155_fops = {
-  read:		dt3155_read,
-  ioctl:		dt3155_ioctl,
-  mmap:		dt3155_mmap,
-  poll:           dt3155_poll,
-  open:		dt3155_open,
-  release:	dt3155_close
+	.read		= dt3155_read,
+	.unlocked_ioctl	= dt3155_unlocked_ioctl,
+	.mmap		= dt3155_mmap,
+	.poll		= dt3155_poll,
+	.open		= dt3155_open,
+	.release	= dt3155_close
 };
 
 
diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index 1ab9a985dfb..bc16fc070fd 100644
--- a/drivers/staging/vme/devices/vme_user.c
+++ b/drivers/staging/vme/devices/vme_user.c
@@ -31,6 +31,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/syscalls.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 
 #include <asm/io.h>
@@ -130,8 +131,7 @@ static int vme_user_release(struct inode *, struct file *);
 static ssize_t vme_user_read(struct file *, char *, size_t, loff_t *);
 static ssize_t vme_user_write(struct file *, const char *, size_t, loff_t *);
 static loff_t vme_user_llseek(struct file *, loff_t, int);
-static int vme_user_ioctl(struct inode *, struct file *, unsigned int,
-	unsigned long);
+static long vme_user_unlocked_ioctl(struct file *, unsigned int, unsigned long);
 
 static int __init vme_user_probe(struct device *, int, int);
 static int __exit vme_user_remove(struct device *, int, int);
@@ -142,7 +142,7 @@ static struct file_operations vme_user_fops = {
         .read = vme_user_read,
         .write = vme_user_write,
         .llseek = vme_user_llseek,
-        .ioctl = vme_user_ioctl,
+        .unlocked_ioctl = vme_user_unlocked_ioctl,
 };
 
 
@@ -555,6 +555,18 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
 	return -EINVAL;
 }
 
+static long
+vme_user_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	int ret;
+
+	lock_kernel();
+	ret = vme_user_ioctl(file->f_path.dentry->d_inode, file, cmd, arg);
+	unlock_kernel();
+
+	return ret;
+}
+
 
 /*
  * Unallocate a previously allocated buffer
-- 
2.20.1