[S390] vmcp: add missing compat ptr conversion

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c
index a6087ce..921dcda 100644 (file)
--- a/drivers/s390/char/vmcp.c
+++ b/drivers/s390/char/vmcp.c
@@ -19,6 +19,7 @@
 #include <linux/kernel.h>
 #include <linux/miscdevice.h>
 #include <linux/module.h>
+#include <asm/compat.h>
 #include <asm/cpcmd.h>
 #include <asm/debug.h>
 #include <asm/uaccess.h>
@@ -139,21 +140,26 @@ vmcp_write(struct file *file, const char __user *buff, size_t count,
 static long vmcp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
        struct vmcp_session *session;
+       int __user *argp;
        int temp;
 
        session = (struct vmcp_session *)file->private_data;
+       if (is_compat_task())
+               argp = compat_ptr(arg);
+       else
+               argp = (int __user *)arg;
        if (mutex_lock_interruptible(&session->mutex))
                return -ERESTARTSYS;
        switch (cmd) {
        case VMCP_GETCODE:
                temp = session->resp_code;
                mutex_unlock(&session->mutex);
-               return put_user(temp, (int __user *)arg);
+               return put_user(temp, argp);
        case VMCP_SETBUF:
                free_pages((unsigned long)session->response,
                                get_order(session->bufsize));
                session->response=NULL;
-               temp = get_user(session->bufsize, (int __user *)arg);
+               temp = get_user(session->bufsize, argp);
                if (get_order(session->bufsize) > 8) {
                        session->bufsize = PAGE_SIZE;
                        temp = -EINVAL;
@@ -163,7 +169,7 @@ static long vmcp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
        case VMCP_GETSIZE:
                temp = session->resp_size;
                mutex_unlock(&session->mutex);
-               return put_user(temp, (int __user *)arg);
+               return put_user(temp, argp);
        default:
                mutex_unlock(&session->mutex);
                return -ENOIOCTLCMD;