staging: r8188eu: read aid from struct ieee80211_mgmt

Read the aid of the association response message from struct
ieee80211_mgmt. This should be easier to understand and to review than
calculating the offset manually.

Remove the cast to int, aid is a u16.
Keep the 0x3fff mask that is currently applied to the aid.

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/20220806111352.690650-5-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 0a78b8b..1007435 100644 (file)
--- a/drivers/staging/r8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/r8188eu/core/rtw_mlme_ext.c
@@ -1353,8 +1353,7 @@ unsigned int OnAssocRsp(struct adapter *padapter, struct recv_frame *precv_frame
        /* set slot time */
        pmlmeinfo->slotTime = (pmlmeinfo->capability & BIT(10)) ? 9 : 20;
 
-       /* AID */
-       pmlmeinfo->aid = (int)(le16_to_cpu(*(__le16 *)(pframe + WLAN_HDR_A3_LEN + 4)) & 0x3fff);
+       pmlmeinfo->aid = le16_to_cpu(mgmt->u.assoc_resp.aid) & 0x3fff;
        res = pmlmeinfo->aid;
 
        /* following are moved to join event callback function */