staging: vme_user: mark user-space buffers with __user

Signed-off-by: Emilio G. Cota <cota@braap.org>
[martyn.welch@ge.com: modified to remove checkpatch warnings]
Signed-off-by: Martyn Welch <martyn.welch@ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/staging/vme/devices/vme_user.c b/drivers/staging/vme/devices/vme_user.c
index 5d3a39b..3638148 100644 (file)
--- a/drivers/staging/vme/devices/vme_user.c
+++ b/drivers/staging/vme/devices/vme_user.c
@@ -129,8 +129,9 @@ static const int type[VME_DEVS] = { MASTER_MINOR,   MASTER_MINOR,
 
 static int vme_user_open(struct inode *, struct file *);
 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 ssize_t vme_user_read(struct file *, char __user *, size_t, loff_t *);
+static ssize_t vme_user_write(struct file *, const char __user *, size_t,
+       loff_t *);
 static loff_t vme_user_llseek(struct file *, loff_t, int);
 static long vme_user_unlocked_ioctl(struct file *, unsigned int, unsigned long);
 
@@ -246,7 +247,7 @@ static ssize_t resource_to_user(int minor, char __user *buf, size_t count,
  * page) transfers will lock the user space buffer into memory and then
  * transfer the data directly from the user space buffers out to VME.
  */
-static ssize_t resource_from_user(unsigned int minor, const char *buf,
+static ssize_t resource_from_user(unsigned int minor, const char __user *buf,
        size_t count, loff_t *ppos)
 {
        ssize_t retval;
@@ -293,7 +294,7 @@ static ssize_t buffer_to_user(unsigned int minor, char __user *buf,
        return retval;
 }
 
-static ssize_t buffer_from_user(unsigned int minor, const char *buf,
+static ssize_t buffer_from_user(unsigned int minor, const char __user *buf,
        size_t count, loff_t *ppos)
 {
        void *image_ptr;
@@ -312,7 +313,7 @@ static ssize_t buffer_from_user(unsigned int minor, const char *buf,
        return retval;
 }
 
-static ssize_t vme_user_read(struct file *file, char *buf, size_t count,
+static ssize_t vme_user_read(struct file *file, char __user *buf, size_t count,
                        loff_t *ppos)
 {
        unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev);
@@ -356,8 +357,8 @@ static ssize_t vme_user_read(struct file *file, char *buf, size_t count,
        return retval;
 }
 
-static ssize_t vme_user_write(struct file *file, const char *buf, size_t count,
-                        loff_t *ppos)
+static ssize_t vme_user_write(struct file *file, const char __user *buf,
+                       size_t count, loff_t *ppos)
 {
        unsigned int minor = MINOR(file->f_dentry->d_inode->i_rdev);
        ssize_t retval;
@@ -455,6 +456,7 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
        unsigned int minor = MINOR(inode->i_rdev);
        int retval;
        dma_addr_t pci_addr;
+       void __user *argp = (void __user *)arg;
 
        statistics.ioctls++;
 
@@ -474,7 +476,7 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
                                &master.size, &master.aspace,
                                &master.cycle, &master.dwidth);
 
-                       copied = copy_to_user((char *)arg, &master,
+                       copied = copy_to_user(argp, &master,
                                sizeof(struct vme_master));
                        if (copied != 0) {
                                printk(KERN_WARNING "Partial copy to "
@@ -487,8 +489,7 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
 
                case VME_SET_MASTER:
 
-                       copied = copy_from_user(&master, (char *)arg,
-                               sizeof(master));
+                       copied = copy_from_user(&master, argp, sizeof(master));
                        if (copied != 0) {
                                printk(KERN_WARNING "Partial copy from "
                                        "userspace\n");
@@ -518,7 +519,7 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
                                &slave.size, &pci_addr, &slave.aspace,
                                &slave.cycle);
 
-                       copied = copy_to_user((char *)arg, &slave,
+                       copied = copy_to_user(argp, &slave,
                                sizeof(struct vme_slave));
                        if (copied != 0) {
                                printk(KERN_WARNING "Partial copy to "
@@ -531,8 +532,7 @@ static int vme_user_ioctl(struct inode *inode, struct file *file,
 
                case VME_SET_SLAVE:
 
-                       copied = copy_from_user(&slave, (char *)arg,
-                               sizeof(slave));
+                       copied = copy_from_user(&slave, argp, sizeof(slave));
                        if (copied != 0) {
                                printk(KERN_WARNING "Partial copy from "
                                        "userspace\n");