Staging: heci: fix some sparse warnings

This resolves a lot of the more obvious sparse warnings in the code.

There still are some major problems in the ioctl handlers dealing with
user and kernel pointers that this patch does not resolve, that needs to
be addressed still.

Also, the locking seems to be a bit strange in places, which sparse
points out, that too need to be resolved.

Cc: Anas Nashif <anas.nashif@intel.com>
Cc: Marcin Obara <marcin.obara@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/heci/heci.h

@@ -124,12 +124,12 @@ void heci_wd_timer(unsigned long data);
  *  input output function prototype
  */
 int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
-			   struct heci_message_data *u_msg,
+			   struct heci_message_data __user *u_msg,
 			   struct heci_message_data k_msg,
 			   struct heci_file_private *file_ext);
 
 int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
-			      struct heci_message_data *u_msg,
+			      struct heci_message_data __user *u_msg,
 			      struct heci_message_data k_msg,
 			      struct file *file);
 
@@ -148,7 +148,7 @@ int pthi_write(struct iamt_heci_device *dev,
 	       struct heci_cb_private *priv_cb);
 
 int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
-	      char *ubuf, size_t length, loff_t *offset);
+	      char __user *ubuf, size_t length, loff_t *offset);
 
 struct heci_cb_private *find_pthi_read_list_entry(
 			struct iamt_heci_device *dev,

drivers/staging/heci/heci_data_structures.h

@@ -428,7 +428,7 @@ struct iamt_heci_device {
 	 */
 	unsigned int mem_base;
 	unsigned int mem_length;
-	char *mem_addr;
+	void __iomem *mem_addr;
 	/*
 	 * lock for the device
 	 */

drivers/staging/heci/heci_init.c

@@ -63,7 +63,7 @@ const __u8 heci_wd_state_independence_msg[3][4] = {
 	{0x07, 0x02, 0x01, 0x10}
 };
 
-const struct guid heci_asf_guid = {
+static const struct guid heci_asf_guid = {
 	0x75B30CD6, 0xA29E, 0x4AF7,
 	{0xA7, 0x12, 0xE6, 0x17, 0x43, 0x93, 0xC8, 0xA6}
 };

drivers/staging/heci/heci_main.c

@@ -71,10 +71,10 @@
 /*
  *  heci driver strings
  */
-char heci_driver_name[] = HECI_DRIVER_NAME;
-char heci_driver_string[] = "Intel(R) Management Engine Interface";
-char heci_driver_version[] = HECI_DRIVER_VERSION;
-char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
+static char heci_driver_name[] = HECI_DRIVER_NAME;
+static char heci_driver_string[] = "Intel(R) Management Engine Interface";
+static char heci_driver_version[] = HECI_DRIVER_VERSION;
+static char heci_copyright[] = "Copyright (c) 2003 - 2008 Intel Corporation.";
 
 
 #ifdef HECI_DEBUG
@@ -96,7 +96,7 @@ static int heci_major;
 /* The device pointer */
 static struct pci_dev *heci_device;
 
-struct class *heci_class;
+static struct class *heci_class;
 
 
 /* heci_pci_tbl - PCI Device ID Table */
@@ -1331,7 +1331,7 @@ static int heci_ioctl(struct inode *inode, struct file *file,
 	int if_num = iminor(inode);
 	struct heci_file_private *file_ext = file->private_data;
 	/* in user space */
-	struct heci_message_data *u_msg = (struct heci_message_data *) data;
+	struct heci_message_data __user *u_msg;
 	struct heci_message_data k_msg;	/* all in kernel on the stack */
 	struct iamt_heci_device *dev;
 
@@ -1353,6 +1353,7 @@ static int heci_ioctl(struct inode *inode, struct file *file,
 	spin_unlock_bh(&dev->device_lock);
 
 	/* first copy from user all data needed */
+	u_msg = (struct heci_message_data __user *)data;
 	if (copy_from_user(&k_msg, u_msg, sizeof(k_msg))) {
 		DBG("first copy from user all data needed filled\n");
 		return -EFAULT;

drivers/staging/heci/io_heci.c

@@ -76,7 +76,7 @@
  * returns 0 on success, <0 on failure.
  */
 int heci_ioctl_get_version(struct iamt_heci_device *dev, int if_num,
-			   struct heci_message_data *u_msg,
+			   struct heci_message_data __user *u_msg,
 			   struct heci_message_data k_msg,
 			   struct heci_file_private *file_ext)
 {
@@ -136,7 +136,7 @@ end:
  * returns 0 on success, <0 on failure.
  */
 int heci_ioctl_connect_client(struct iamt_heci_device *dev, int if_num,
-			      struct heci_message_data *u_msg,
+			      struct heci_message_data __user *u_msg,
 			      struct heci_message_data k_msg,
 			      struct file *file)
 {
@@ -524,7 +524,7 @@ struct heci_cb_private *find_pthi_read_list_entry(
  *  negative on failure.
  */
 int pthi_read(struct iamt_heci_device *dev, int if_num, struct file *file,
-	      char *ubuf, size_t length, loff_t *offset)
+	      char __user *ubuf, size_t length, loff_t *offset)
 {
 	int rets = 0;
 	struct heci_cb_private *priv_cb = NULL;