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From: Arnd Bergmann on 26 Apr 2010 18:30
Signed-off-by: Arnd Bergmann <arnd(a)arndb.de>
---
drivers/staging/crystalhd/crystalhd_lnx.c | 13 +++++++++----
drivers/staging/dt3155/dt3155_drv.c | 24 ++++++++++++++++++------
drivers/staging/poch/poch.c | 17 +++++++++++++++--
drivers/staging/vme/devices/vme_user.c | 18 +++++++++++++++---
4 files changed, 57 insertions(+), 15 deletions(-)

diff --git a/drivers/staging/crystalhd/crystalhd_lnx.c b/drivers/staging/crystalhd/crystalhd_lnx.c
index 54bad65..3291e14 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 e2c44ec..7e6095f 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/poch/poch.c b/drivers/staging/poch/poch.c
index f940a34..bf46e29 100644
--- a/drivers/staging/poch/poch.c
+++ b/drivers/staging/poch/poch.c
@@ -16,6 +16,7 @@
#include <linux/sysfs.h>
#include <linux/poll.h>
#include <linux/idr.h>
+#include <linux/smp_lock.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/ioctl.h>
@@ -911,7 +912,7 @@ static unsigned int poch_poll(struct file *filp, poll_table *pt)
return ret;
}

-static int poch_ioctl(struct inode *inode, struct file *filp,
+static int poch_ioctl(struct file *filp,
unsigned int cmd, unsigned long arg)
{
struct channel_info *channel = filp->private_data;
@@ -1033,11 +1034,23 @@ static int poch_ioctl(struct inode *inode, struct file *filp,
return 0;
}

+static long
+poch_unlocked_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ int ret;
+
+ lock_kernel();
+ ret = poch_ioctl(file, cmd, arg);
+ unlock_kernel();
+
+ return ret;
+}
+
static struct file_operations poch_fops = {
.owner = THIS_MODULE,
.open = poch_open,
.release = poch_release,
- .ioctl = poch_ioctl,
+ .poch_ioctl = poch_unlocked_ioctl,
.poll = poch_poll,
.mmap = poch_mmap
};
diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index 1ab9a98..bc16fc0 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
--
1.7.0.4

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Prev: [PATCH 0/6] Push down BKL into device drivers
Next: [PATCH 2/2] mm,migration: Prevent rmap_walk_[anon|ksm] seeing the wrong VMA information