As Dan said, the original was better, but
it could still be improved.
There is only a single case used in the switch.
Perhaps better would be to reduce indentation
by removing the switch and using another goto
label for the memory allocation freeing like the
below.
Perhaps better still, if there were to be more
cases added in the future, would be to move the
case handling logic into separate functions.
---
drivers/staging/rtl8192e/rtl8192e/rtl_core.c | 177 +++++++++++++--------------
1 file changed, 82 insertions(+), 95 deletions(-)
diff --git a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
index 4c0caa6701a9..8c48b0a527ec 100644
--- a/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
+++ b/drivers/staging/rtl8192e/rtl8192e/rtl_core.c
@@ -2283,115 +2283,102 @@ static int _rtl92e_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
int ret = -1;
struct rtllib_device *ieee = priv->rtllib;
u32 key[4];
- const u8 broadcast_addr[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
+ static const u8 broadcast_addr[ETH_ALEN] = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
+ };
struct iw_point *p = &wrq->u.data;
struct ieee_param *ipw = NULL;
mutex_lock(&priv->wx_mutex);
- switch (cmd) {
- case RTL_IOCTL_WPA_SUPPLICANT:
- if (p->length < sizeof(struct ieee_param) || !p->pointer) {
- ret = -EINVAL;
- goto out;
- }
+ if (cmd != RTL_IOCTL_WPA_SUPPLICANT) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
- ipw = memdup_user(p->pointer, p->length);
- if (IS_ERR(ipw)) {
- ret = PTR_ERR(ipw);
- goto out;
- }
+ if (p->length < sizeof(struct ieee_param) || !p->pointer) {
+ ret = -EINVAL;
+ goto out;
+ }
- if (ipw->cmd == IEEE_CMD_SET_ENCRYPTION) {
- if (ipw->u.crypt.set_tx) {
- if (strcmp(ipw->u.crypt.alg, "CCMP") == 0)
- ieee->pairwise_key_type = KEY_TYPE_CCMP;
- else if (strcmp(ipw->u.crypt.alg, "TKIP") == 0)
- ieee->pairwise_key_type = KEY_TYPE_TKIP;
- else if (strcmp(ipw->u.crypt.alg, "WEP") == 0) {
- if (ipw->u.crypt.key_len == 13)
- ieee->pairwise_key_type =
- KEY_TYPE_WEP104;
- else if (ipw->u.crypt.key_len == 5)
- ieee->pairwise_key_type =
- KEY_TYPE_WEP40;
- } else {
- ieee->pairwise_key_type = KEY_TYPE_NA;
- }
+ ipw = memdup_user(p->pointer, p->length);
+ if (IS_ERR(ipw)) {
+ ret = PTR_ERR(ipw);
+ goto out;
+ }
- if (ieee->pairwise_key_type) {
- if (is_zero_ether_addr(ieee->ap_mac_addr))
- ieee->iw_mode = IW_MODE_ADHOC;
- memcpy((u8 *)key, ipw->u.crypt.key, 16);
- rtl92e_enable_hw_security_config(dev);
- rtl92e_set_swcam(dev, 4,
- ipw->u.crypt.idx,
- ieee->pairwise_key_type,
- (u8 *)ieee->ap_mac_addr,
- 0, key, 0);
- rtl92e_set_key(dev, 4, ipw->u.crypt.idx,
- ieee->pairwise_key_type,
- (u8 *)ieee->ap_mac_addr,
- 0, key);
- if (ieee->iw_mode == IW_MODE_ADHOC) {
- rtl92e_set_swcam(dev,
- ipw->u.crypt.idx,
- ipw->u.crypt.idx,
- ieee->pairwise_key_type,
- (u8 *)ieee->ap_mac_addr,
- 0, key, 0);
- rtl92e_set_key(dev,
- ipw->u.crypt.idx,
- ipw->u.crypt.idx,
- ieee->pairwise_key_type,
- (u8 *)ieee->ap_mac_addr,
- 0, key);
- }
- }
- if ((ieee->pairwise_key_type == KEY_TYPE_CCMP)
- && ieee->pHTInfo->bCurrentHTSupport) {
- rtl92e_writeb(dev, 0x173, 1);
- }
+ if (ipw->cmd != IEEE_CMD_SET_ENCRYPTION)
+ goto out_free;
- } else {
- memcpy((u8 *)key, ipw->u.crypt.key, 16);
- if (strcmp(ipw->u.crypt.alg, "CCMP") == 0)
- ieee->group_key_type = KEY_TYPE_CCMP;
- else if (strcmp(ipw->u.crypt.alg, "TKIP") == 0)
- ieee->group_key_type = KEY_TYPE_TKIP;
- else if (strcmp(ipw->u.crypt.alg, "WEP") == 0) {
- if (ipw->u.crypt.key_len == 13)
- ieee->group_key_type =
- KEY_TYPE_WEP104;
- else if (ipw->u.crypt.key_len == 5)
- ieee->group_key_type =
- KEY_TYPE_WEP40;
- } else
- ieee->group_key_type = KEY_TYPE_NA;
-
- if (ieee->group_key_type) {
- rtl92e_set_swcam(dev, ipw->u.crypt.idx,
- ipw->u.crypt.idx,
- ieee->group_key_type,
- broadcast_addr, 0, key,
- 0);
- rtl92e_set_key(dev, ipw->u.crypt.idx,
- ipw->u.crypt.idx,
- ieee->group_key_type,
- broadcast_addr, 0, key);
- }
+ if (ipw->u.crypt.set_tx) {
+ if (strcmp(ipw->u.crypt.alg, "CCMP") == 0) {
+ ieee->pairwise_key_type = KEY_TYPE_CCMP;
+ } else if (strcmp(ipw->u.crypt.alg, "TKIP") == 0) {
+ ieee->pairwise_key_type = KEY_TYPE_TKIP;
+ } else if (strcmp(ipw->u.crypt.alg, "WEP") == 0) {
+ if (ipw->u.crypt.key_len == 13)
+ ieee->pairwise_key_type = KEY_TYPE_WEP104;
+ else if (ipw->u.crypt.key_len == 5)
+ ieee->pairwise_key_type = KEY_TYPE_WEP40;
+ } else {
+ ieee->pairwise_key_type = KEY_TYPE_NA;
+ }
+
+ if (ieee->pairwise_key_type) {
+ if (is_zero_ether_addr(ieee->ap_mac_addr))
+ ieee->iw_mode = IW_MODE_ADHOC;
+ memcpy((u8 *)key, ipw->u.crypt.key, 16);
+ rtl92e_enable_hw_security_config(dev);
+ rtl92e_set_swcam(dev, 4, ipw->u.crypt.idx,
+ ieee->pairwise_key_type,
+ (u8 *)ieee->ap_mac_addr, 0, key, 0);
+ rtl92e_set_key(dev, 4, ipw->u.crypt.idx,
+ ieee->pairwise_key_type,
+ (u8 *)ieee->ap_mac_addr, 0, key);
+ if (ieee->iw_mode == IW_MODE_ADHOC) {
+ rtl92e_set_swcam(dev, ipw->u.crypt.idx,
+ ipw->u.crypt.idx,
+ ieee->pairwise_key_type,
+ (u8 *)ieee->ap_mac_addr,
+ 0, key, 0);
+ rtl92e_set_key(dev, ipw->u.crypt.idx,
+ ipw->u.crypt.idx,
+ ieee->pairwise_key_type,
+ (u8 *)ieee->ap_mac_addr, 0, key);
}
}
+ if ((ieee->pairwise_key_type == KEY_TYPE_CCMP) &&
+ ieee->pHTInfo->bCurrentHTSupport)
+ rtl92e_writeb(dev, 0x173, 1);
+ } else {
+ memcpy((u8 *)key, ipw->u.crypt.key, 16);
+ if (strcmp(ipw->u.crypt.alg, "CCMP") == 0) {
+ ieee->group_key_type = KEY_TYPE_CCMP;
+ } else if (strcmp(ipw->u.crypt.alg, "TKIP") == 0) {
+ ieee->group_key_type = KEY_TYPE_TKIP;
+ } else if (strcmp(ipw->u.crypt.alg, "WEP") == 0) {
+ if (ipw->u.crypt.key_len == 13)
+ ieee->group_key_type = KEY_TYPE_WEP104;
+ else if (ipw->u.crypt.key_len == 5)
+ ieee->group_key_type = KEY_TYPE_WEP40;
+ } else {
+ ieee->group_key_type = KEY_TYPE_NA;
+ }
- ret = rtllib_wpa_supplicant_ioctl(priv->rtllib, &wrq->u.data,
- 0);
- kfree(ipw);
- break;
- default:
- ret = -EOPNOTSUPP;
- break;
+ if (ieee->group_key_type) {
+ rtl92e_set_swcam(dev, ipw->u.crypt.idx,
+ ipw->u.crypt.idx, ieee->group_key_type,
+ broadcast_addr, 0, key, 0);
+ rtl92e_set_key(dev, ipw->u.crypt.idx, ipw->u.crypt.idx,
+ ieee->group_key_type, broadcast_addr,
+ 0, key);
+ }
}
+out_free:
+ ret = rtllib_wpa_supplicant_ioctl(priv->rtllib, &wrq->u.data, 0);
+ kfree(ipw);
+
out:
mutex_unlock(&priv->wx_mutex);
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