staging: tidspbridge: Remove cfg_get_exec_file()

As the services directory is going to be removed, the cfg_get_exec_file
function has also to be removed.

This patch also avoids a possible NULL pointer dereference in function
cfg_get_exec_file(), when drv_datap is checked for NULL and then pass
drv_datap->base_img as argument to strlen().
Signed-off-by: Ivan Gomez Castellanos <ivan.gomez@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/tidspbridge/include/dspbridge/cfg.h

@@ -40,28 +40,6 @@
  */
 extern int cfg_get_cd_version(u32 *version);
 
-/*
- *  ======== cfg_get_exec_file ========
- *  Purpose:
- *      Retreive the default executable, if any, for this board.
- *  Parameters:
- *      dev_node_obj: Handle to the dev_node who's driver we are querying.
- *      buf_size:       Size of buffer.
- *      str_exec_file:  Ptr to character buf to hold ExecFile.
- *  Returns:
- *      0:                Success.
- *      -EFAULT:  dev_node_obj is invalid or str_exec_file is invalid.
- *      -ENODATA: The resource is not available.
- *  Requires:
- *      CFG initialized.
- *  Ensures:
- *      0:    Not more than buf_size bytes were copied into str_exec_file,
- *                  and *str_exec_file contains default executable for this
- *                  devnode.
- */
-extern int cfg_get_exec_file(struct cfg_devnode *dev_node_obj,
-				    u32 buf_size, char *str_exec_file);
-
 /*
  *  ======== cfg_get_object ========
  *  Purpose:

drivers/staging/tidspbridge/rmgr/proc.c

@@ -393,18 +393,29 @@ static int get_exec_file(struct cfg_devnode *dev_node_obj,
 {
 	u8 dev_type;
 	s32 len;
+	struct drv_data *drv_datap = dev_get_drvdata(bridge);
 
 	dev_get_dev_type(hdev_obj, (u8 *) &dev_type);
+
+	if (!exec_file)
+		return -EFAULT;
+
 	if (dev_type == DSP_UNIT) {
-		return cfg_get_exec_file(dev_node_obj, size, exec_file);
-	} else if (dev_type == IVA_UNIT) {
-		if (iva_img) {
-			len = strlen(iva_img);
-			strncpy(exec_file, iva_img, len + 1);
-			return 0;
-		}
+		if (!drv_datap || !drv_datap->base_img)
+			return -EFAULT;
+
+		if (strlen(drv_datap->base_img) > size)
+			return -EINVAL;
+
+		strcpy(exec_file, drv_datap->base_img);
+	} else if (dev_type == IVA_UNIT && iva_img) {
+		len = strlen(iva_img);
+		strncpy(exec_file, iva_img, len + 1);
+	} else {
+		return -ENOENT;
 	}
-	return -ENOENT;
+
+	return 0;
 }
 
 /*

drivers/staging/tidspbridge/services/cfg.c

@@ -30,37 +30,6 @@
 #include <dspbridge/cfg.h>
 #include <dspbridge/drv.h>
 
-/*
- *  ======== cfg_get_exec_file ========
- *  Purpose:
- *      Retreive the default executable, if any, for this board.
- */
-int cfg_get_exec_file(struct cfg_devnode *dev_node_obj, u32 buf_size,
-			     char *str_exec_file)
-{
-	int status = 0;
-	struct drv_data *drv_datap = dev_get_drvdata(bridge);
-
-	if (!dev_node_obj)
-		status = -EFAULT;
-
-	else if (!str_exec_file || !drv_datap)
-		status = -EFAULT;
-
-	if (strlen(drv_datap->base_img) > buf_size)
-		status = -EINVAL;
-
-	if (!status && drv_datap->base_img)
-		strcpy(str_exec_file, drv_datap->base_img);
-
-	if (status)
-		pr_err("%s: Failed, status 0x%x\n", __func__, status);
-	DBC_ENSURE(((status == 0) &&
-		    (strlen(str_exec_file) <= buf_size))
-		   || (status != 0));
-	return status;
-}
-
 /*
  *  ======== cfg_get_object ========
  *  Purpose: