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Subject[PATCH 6/7] staging: ks7010: Factor out repeated code for reading IEs.
Date
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>
---
drivers/staging/ks7010/ks_hostif.c | 31 +++++++++++++++----------------
1 file changed, 15 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/ks7010/ks_hostif.c b/drivers/staging/ks7010/ks_hostif.c
index 1a0fe15e842e..21219d0bbb6a 100644
--- 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;

--
2.16.2
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