commit 0fcad9b51b807bf56507a2fd5eefa92ebbbd8702
author Girish Gowli <c_ggowli@qti.qualcomm.com> Thu Jun 12 18:44:33 2014 +0530
committer Akash Patel <c_akashp@qca.qualcomm.com> Sat Jun 21 02:10:04 2014 -0700
tree 1b3e5754bd0081af2d842e17a6204d02f873a3a5
parent 43fd52323d59803d9a67c475217052df2c22a40a

wlan: Add helper function hdd_priv_get_data for "compat" support

Compat handling is required for some ioctl handlers when used in
32U/64K environment.
Adding a common function hdd_priv_get_data() for compat handling
so that when the driver is part of 64-bit kernel, handlers can
use it to work with 32-bit userspace applications

Change-Id: Ifb1e2022301e6b34ae9c1a7aca89a891642d834e
CRs-Fixed: 681631

CORE/HDD/inc/wlan_hdd_wext.h

diff --git a/CORE/HDD/inc/wlan_hdd_wext.h b/CORE/HDD/inc/wlan_hdd_wext.h
index 6788375..b858ed6 100644
--- a/CORE/HDD/inc/wlan_hdd_wext.h
+++ b/CORE/HDD/inc/wlan_hdd_wext.h
@@ -386,6 +386,9 @@
 extern int iw_set_three_ints_getnone(struct net_device *dev, struct iw_request_info *info,
                        union iwreq_data *wrqu, char *extra);
 
+extern int hdd_priv_get_data(struct iw_point *p_priv_data,
+                             union iwreq_data *wrqu);
+
 extern VOS_STATUS wlan_hdd_get_linkspeed_for_peermac(hdd_adapter_t *pAdapter,
                                                      tSirMacAddr macAddress);
 void hdd_clearRoamProfileIe( hdd_adapter_t *pAdapter);

CORE/HDD/src/wlan_hdd_wext.c

diff --git a/CORE/HDD/src/wlan_hdd_wext.c b/CORE/HDD/src/wlan_hdd_wext.c
index 03d96db..bed3179 100644
--- a/CORE/HDD/src/wlan_hdd_wext.c
+++ b/CORE/HDD/src/wlan_hdd_wext.c
@@ -616,6 +616,49 @@
 
 /**---------------------------------------------------------------------------
 
+  \brief hdd_priv_get_data -
+
+   Helper function to get compatible struct iw_point passed to ioctl
+
+  \param  - p_priv_data - pointer to iw_point struct to be filled
+            wrqu - Pointer to IOCTL Data received from userspace
+
+  \return - 0 if p_priv_data successfully filled
+            error otherwise
+
+  --------------------------------------------------------------------------*/
+int hdd_priv_get_data(struct iw_point *p_priv_data,
+                      union iwreq_data *wrqu)
+{
+   if ((NULL == p_priv_data) || (NULL == wrqu)) {
+      return -EINVAL;
+   }
+
+#ifdef CONFIG_COMPAT
+   if (is_compat_task()) {
+      struct compat_iw_point *p_compat_priv_data;
+
+      /* Compat task: typecast to compat structure and copy the members. */
+      p_compat_priv_data = (struct compat_iw_point *) &wrqu->data;
+
+      p_priv_data->pointer = compat_ptr(p_compat_priv_data->pointer);
+      p_priv_data->length  = p_compat_priv_data->length;
+      p_priv_data->flags   = p_compat_priv_data->flags;
+   } else {
+#endif /* #ifdef CONFIG_COMPAT */
+
+      /* Non compat task: directly copy the structure. */
+      memcpy(p_priv_data, &wrqu->data, sizeof(struct iw_point));
+
+#ifdef CONFIG_COMPAT
+   }
+#endif /* #ifdef CONFIG_COMPAT */
+
+   return 0;
+}
+
+/**---------------------------------------------------------------------------
+
   \brief hdd_wlan_get_version() -
 
    This function use to get Wlan Driver, Firmware, & Hardware Version.