staging: ks7010: Factor out repeated code for reading IEs.

Some of the code for reading IEs is replicated multiple times in the
switch statement for get_ap_information().  Factor that code out into
read_ie().

Signed-off-by: Quytelda Kahja <quytelda@tamalin.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/ks7010/ks_hostif.c b/drivers/staging/ks7010/ks_hostif.c
index 1a0fe15..21219d0 100644 (file)
--- a/drivers/staging/ks7010/ks_hostif.c
+++ b/drivers/staging/ks7010/ks_hostif.c
@@ -216,6 +216,15 @@ int get_current_ap(struct ks_wlan_private *priv, struct link_ap_info_t *ap_info)
        return 0;
 }
 
+static u8 read_ie(unsigned char *bp, u8 max, u8 *body)
+{
+       u8 size = (*(bp + 1) <= max) ? *(bp + 1) : max;
+
+       memcpy(body, bp + 2, size);
+       return size;
+}
+
+
 static
 int get_ap_information(struct ks_wlan_private *priv, struct ap_info_t *ap_info,
                       struct local_ap_t *ap)
@@ -245,11 +254,8 @@ int get_ap_information(struct ks_wlan_private *priv, struct ap_info_t *ap_info,
        while (bsize > offset) {
                switch (*bp) { /* Information Element ID */
                case WLAN_EID_SSID:
-                       if (*(bp + 1) <= IEEE80211_MAX_SSID_LEN)
-                               ap->ssid.size = *(bp + 1);
-                       else
-                               ap->ssid.size = IEEE80211_MAX_SSID_LEN;
-                       memcpy(ap->ssid.body, bp + 2, ap->ssid.size);
+                       ap->ssid.size = read_ie(bp, IEEE80211_MAX_SSID_LEN,
+                                               ap->ssid.body);
                        break;
                case WLAN_EID_SUPP_RATES:
                case WLAN_EID_EXT_SUPP_RATES:
@@ -270,22 +276,15 @@ int get_ap_information(struct ks_wlan_private *priv, struct ap_info_t *ap_info,
                        break;
                case WLAN_EID_RSN:
                        ap->rsn_ie.id = *bp;
-                       if (*(bp + 1) <= RSN_IE_BODY_MAX)
-                               ap->rsn_ie.size = *(bp + 1);
-                       else
-                               ap->rsn_ie.size = RSN_IE_BODY_MAX;
-                       memcpy(ap->rsn_ie.body, bp + 2, ap->rsn_ie.size);
+                       ap->rsn_ie.size = read_ie(bp, RSN_IE_BODY_MAX,
+                                                 ap->rsn_ie.body);
                        break;
                case WLAN_EID_VENDOR_SPECIFIC: /* WPA */
                        /* WPA OUI check */
                        if (memcmp(bp + 2, CIPHER_ID_WPA_WEP40, 4) == 0) {
                                ap->wpa_ie.id = *bp;
-                               if (*(bp + 1) <= RSN_IE_BODY_MAX)
-                                       ap->wpa_ie.size = *(bp + 1);
-                               else
-                                       ap->wpa_ie.size = RSN_IE_BODY_MAX;
-                               memcpy(ap->wpa_ie.body, bp + 2,
-                                      ap->wpa_ie.size);
+                               ap->wpa_ie.size = read_ie(bp, RSN_IE_BODY_MAX,
+                                                         ap->wpa_ie.body);
                        }
                        break;