--- a/src/drv_vmmc_init.c
+++ b/src/drv_vmmc_init.c
@@ -784,7 +784,7 @@ IFX_int32_t VMMC_TAPI_LL_FW_Start(IFX_TA
       dwld.fwDwld.length = IoInit.pram_size;
 
      /* download firmware */
-      ret = ifx_mps_ioctl((IFX_void_t *) command, IFX_NULL, FIO_MPS_DOWNLOAD,
+      ret = ifx_mps_ioctl((IFX_void_t *) command, FIO_MPS_DOWNLOAD,
                           (IFX_uint32_t) &dwld.fwDwld);
    }
 
@@ -1594,7 +1594,7 @@ IFX_void_t VMMC_DeviceDriverStop(IFX_voi
 #ifdef VMMC_DRIVER_UNLOAD_HOOK
    if (VDevices[0].nDevState & DS_GPIO_RESERVED)
    {
-      IFX_int32_t ret;
+      IFX_int32_t ret = 0;
       VMMC_DRIVER_UNLOAD_HOOK(ret);
       if (!VMMC_SUCCESS(ret))
       {
--- a/src/mps/drv_mps_vmmc_linux.c
+++ b/src/mps/drv_mps_vmmc_linux.c
@@ -110,7 +110,7 @@ IFX_int32_t ifx_mps_get_status_proc (IFX
 #ifndef __KERNEL__
 IFX_int32_t ifx_mps_open (struct inode *inode, struct file *file_p);
 IFX_int32_t ifx_mps_close (struct inode *inode, struct file *file_p);
-IFX_int32_t ifx_mps_ioctl (struct inode *inode, struct file *file_p,
+long ifx_mps_ioctl (struct file *file_p,
                            IFX_uint32_t nCmd, IFX_ulong_t arg);
 IFX_int32_t ifx_mps_read_mailbox (mps_devices type, mps_message * rw);
 IFX_int32_t ifx_mps_write_mailbox (mps_devices type, mps_message * rw);
@@ -171,7 +171,7 @@ IFX_char_t voice_channel_int_name[NUM_VO
 static struct file_operations ifx_mps_fops = {
  owner:THIS_MODULE,
  poll:ifx_mps_poll,
- ioctl:ifx_mps_ioctl,
+ unlocked_ioctl:ifx_mps_ioctl,
  open:ifx_mps_open,
  release:ifx_mps_close
 };
@@ -614,7 +614,7 @@ static IFX_uint32_t ifx_mps_poll (struct
  * \return  -ENOIOCTLCMD Invalid command
  * \ingroup API
  */
-IFX_int32_t ifx_mps_ioctl (struct inode * inode, struct file * file_p,
+long ifx_mps_ioctl (struct file *file_p,
                            IFX_uint32_t nCmd, IFX_ulong_t arg)
 {
    IFX_int32_t retvalue = -EINVAL;
@@ -629,17 +629,18 @@ IFX_int32_t ifx_mps_ioctl (struct inode 
       'mps_devices' enum type, which in fact is [0..8]; So, if inode value is
       [0..NUM_VOICE_CHANNEL+1], then we make sure that we are calling from
       kernel space. */
-   if (((IFX_int32_t) inode >= 0) &&
-       ((IFX_int32_t) inode < NUM_VOICE_CHANNEL + 1))
+   if (((IFX_int32_t) file_p >= 0) &&
+       ((IFX_int32_t) file_p < NUM_VOICE_CHANNEL + 1))
    {
       from_kernel = 1;
 
       /* Get corresponding mailbox device structure */
       if ((pMBDev =
-           ifx_mps_get_device ((mps_devices) ((IFX_int32_t) inode))) == 0)
+           ifx_mps_get_device ((mps_devices) ((IFX_int32_t) file_p))) == 0)
       {
          return (-EINVAL);
       }
+      file_p = NULL;
    }
    else
    {
--- a/src/drv_vmmc_ioctl.c
+++ b/src/drv_vmmc_ioctl.c
@@ -427,18 +427,18 @@ IFX_int32_t VMMC_Dev_Spec_Ioctl (IFX_TAP
          /* MPS driver will do the USR2KERN so just pass on the pointer. */
          dwnld_struct.data = (IFX_void_t *)IoInit.pPRAMfw;
 
-         ret = ifx_mps_ioctl((IFX_void_t *)command, IFX_NULL,
+         ret = ifx_mps_ioctl((IFX_void_t *)command,
                              FIO_MPS_DOWNLOAD, (IFX_uint32_t) &dwnld_struct);
          break;
       }
       case FIO_DEV_RESET:
       {
-         ret = ifx_mps_ioctl((IFX_void_t *)command, IFX_NULL, FIO_MPS_RESET, 0);
+         ret = ifx_mps_ioctl((IFX_void_t *)command, FIO_MPS_RESET, 0);
          break;
       }
       case FIO_DEV_RESTART:
       {
-         ret = ifx_mps_ioctl((IFX_void_t *)command, IFX_NULL, FIO_MPS_RESTART, 0);
+         ret = ifx_mps_ioctl((IFX_void_t *)command, FIO_MPS_RESTART, 0);
          break;
       }
       case FIO_LASTERR:
--- a/src/mps/drv_mps_vmmc.h
+++ b/src/mps/drv_mps_vmmc.h
@@ -279,7 +279,7 @@ typedef struct
 #include <linux/fs.h>
 IFX_int32_t ifx_mps_open (struct inode *inode, struct file *file_p);
 IFX_int32_t ifx_mps_close (struct inode *inode, struct file *filp);
-IFX_int32_t ifx_mps_ioctl (struct inode *inode, struct file *file_p,
+long ifx_mps_ioctl (struct file *filp,
                            IFX_uint32_t nCmd, unsigned long arg);
 IFX_int32_t ifx_mps_register_data_callback (mps_devices type, IFX_uint32_t dir,
                                             IFX_void_t (*callback) (mps_devices