staging: r8188eu: simplify the calculation of ie start offset

Use offsetof to calculate the start offset of the information elements in
an association response message. This should make it easier to understand
how the offset is calculated.

Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com> # Edimax N150
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Link: https://lore.kernel.org/r/20220806111352.690650-6-martin@kaiser.cx
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/r8188eu/core/rtw_mlme_ext.c b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
index 10074355b82d6d85027237a8c40beef2987e3416..6d3d5ff9a00e84950de5f55fe7d5b8c6739da4ed 100644 (file)
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -1359,7 +1359,7 @@ unsigned int OnAssocRsp(struct adapter *padapter, struct recv_frame *precv_frame
        /* following are moved to join event callback function */
        /* to handle HT, WMM, rate adaptive, update MAC reg */
        /* for not to handle the synchronous IO in the tasklet */
-       for (i = (6 + WLAN_HDR_A3_LEN); i < pkt_len;) {
+       for (i = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable); i < pkt_len;) {
                pIE = (struct ndis_802_11_var_ie *)(pframe + i);
 
                switch (pIE->ElementID) {