iwlwifi: rs-4965 fix return values
This patch cleans up style of 'return' of rate scale 4965 functions.
It renames return name variables rc to ret, change functions to void if no
meaningful value was returned it add return of -EINVAL for checks of wrong
arguments.
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
index 2227ee4..b557faa 100644
--- a/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
+++ b/drivers/net/wireless/iwlwifi/iwl-4965-rs.c
@@ -202,8 +202,6 @@
#ifdef CONFIG_IWLWIFI_DEBUG
int i;
#endif
- int rc = -1;
-
struct iwl_host_cmd cmd = {
.id = REPLY_TX_LINK_QUALITY_CMD,
.len = sizeof(struct iwl_link_quality_cmd),
@@ -213,7 +211,7 @@
if ((lq->sta_id == 0xFF) &&
(priv->iw_mode == IEEE80211_IF_TYPE_IBSS))
- return rc;
+ return -EINVAL;
if (lq->sta_id == 0xFF)
lq->sta_id = IWL_AP_ID;
@@ -233,12 +231,12 @@
if (iwl_is_associated(priv) && priv->assoc_station_added &&
priv->lq_mngr.lq_ready)
- rc = iwl_send_cmd(priv, &cmd);
+ return iwl_send_cmd(priv, &cmd);
- return rc;
+ return 0;
}
-static int rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
+static void rs_rate_scale_clear_window(struct iwl_rate_scale_data *window)
{
window->data = 0;
window->success_counter = 0;
@@ -246,24 +244,18 @@
window->counter = 0;
window->average_tpt = IWL_INVALID_VALUE;
window->stamp = 0;
-
- return 0;
}
static int rs_collect_tx_data(struct iwl_rate_scale_data *windows,
int scale_index, s32 tpt, u32 status)
{
- int rc = 0;
struct iwl_rate_scale_data *window = NULL;
u64 mask;
u8 win_size = IWL_RATE_MAX_WINDOW;
s32 fail_count;
- if (scale_index < 0)
- return -1;
-
- if (scale_index >= IWL_RATE_COUNT)
- return -1;
+ if (scale_index < 0 || scale_index >= IWL_RATE_COUNT)
+ return -EINVAL;
window = &(windows[scale_index]);
@@ -302,15 +294,13 @@
window->stamp = jiffies;
- return rc;
+ return 0;
}
-int static rs_mcs_from_tbl(struct iwl_rate *mcs_rate,
+static void rs_mcs_from_tbl(struct iwl_rate *mcs_rate,
struct iwl_scale_tbl_info *tbl,
int index, u8 use_green)
{
- int rc = 0;
-
if (is_legacy(tbl->lq_type)) {
mcs_rate->rate_n_flags = iwl_rates[index].plcp;
if (index >= IWL_FIRST_CCK_RATE && index <= IWL_LAST_CCK_RATE)
@@ -343,7 +333,7 @@
}
if (is_legacy(tbl->lq_type))
- return rc;
+ return;
if (tbl->is_fat) {
if (tbl->is_dup)
@@ -359,7 +349,6 @@
if (is_siso(tbl->lq_type))
mcs_rate->rate_n_flags &= ~RATE_MCS_SGI_MSK;
}
- return rc;
}
static int rs_get_tbl_info_from_mcs(const struct iwl_rate *mcs_rate,
@@ -373,7 +362,7 @@
if (index == IWL_RATE_INVALID) {
*rate_idx = -1;
- return -1;
+ return -EINVAL;
}
tbl->is_SGI = 0;
tbl->is_fat = 0;
@@ -453,18 +442,16 @@
}
}
-static inline s8 rs_use_green(struct iwl_priv *priv)
+static inline u8 rs_use_green(struct iwl_priv *priv)
{
- s8 rc = 0;
#ifdef CONFIG_IWLWIFI_HT
if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht)
return 0;
- if ((priv->current_assoc_ht.is_green_field) &&
- !(priv->current_assoc_ht.operating_mode & 0x4))
- rc = 1;
+ return ((priv->current_assoc_ht.is_green_field) &&
+ !(priv->current_assoc_ht.operating_mode & 0x4));
#endif /*CONFIG_IWLWIFI_HT */
- return rc;
+ return 0;
}
/**
@@ -548,7 +535,7 @@
return (high << 8) | low;
}
-static int rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data,
+static void rs_get_lower_rate(struct iwl_rate_scale_priv *lq_data,
struct iwl_scale_tbl_info *tbl, u8 scale_index,
u8 ht_possible, struct iwl_rate *mcs_rate)
{
@@ -589,10 +576,9 @@
}
/* if we did switched from HT to legacy check current rate */
- if ((switch_to_legacy) &&
- (rate_mask & (1 << scale_index))) {
+ if (switch_to_legacy && (rate_mask & (1 << scale_index))) {
rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green);
- return 0;
+ return;
}
high_low = rs_get_adjacent_rate(scale_index, rate_mask, tbl->lq_type);
@@ -602,8 +588,6 @@
rs_mcs_from_tbl(mcs_rate, tbl, low, is_green);
else
rs_mcs_from_tbl(mcs_rate, tbl, scale_index, is_green);
-
- return 0;
}
static void rs_tx_status(void *priv_rate,
@@ -775,12 +759,8 @@
return ((valid_antenna & 0x2) ? 1:0);
else if (antenna_type == ANT_MAIN)
return ((valid_antenna & 0x1) ? 1:0);
- else if (antenna_type == ANT_BOTH) {
- if ((valid_antenna & 0x3) == 0x3)
- return 1;
- else
- return 0;
- }
+ else if (antenna_type == ANT_BOTH)
+ return ((valid_antenna & 0x3) == 0x3);
return 1;
}
@@ -789,9 +769,9 @@
enum iwl_antenna_type antenna_type)
{
if (antenna_type == ANT_AUX)
- return (rs_is_ant_connected(valid_antenna, ANT_MAIN));
+ return rs_is_ant_connected(valid_antenna, ANT_MAIN);
else
- return (rs_is_ant_connected(valid_antenna, ANT_AUX));
+ return rs_is_ant_connected(valid_antenna, ANT_AUX);
return 0;
}
@@ -912,7 +892,6 @@
struct iwl_rate_scale_priv *lq_data,
struct iwl_scale_tbl_info *tbl, int index)
{
- int rc = -1;
#ifdef CONFIG_IWLWIFI_HT
u16 rate_mask;
s32 rate;
@@ -932,7 +911,6 @@
if (!rs_is_both_ant_supp(lq_data->antenna))
return -1;
- rc = 0;
tbl->is_dup = lq_data->is_dup;
tbl->action = 0;
if (priv->current_channel_width == IWL_CHANNEL_WIDTH_40MHZ)
@@ -963,14 +941,13 @@
tbl->current_rate.rate_n_flags, is_green);
#endif /*CONFIG_IWLWIFI_HT */
- return rc;
+ return 0;
}
static int rs_switch_to_siso(struct iwl_priv *priv,
struct iwl_rate_scale_priv *lq_data,
struct iwl_scale_tbl_info *tbl, int index)
{
- int rc = -1;
#ifdef CONFIG_IWLWIFI_HT
u16 rate_mask;
u8 is_green = lq_data->is_green;
@@ -980,7 +957,6 @@
if (!priv->is_ht_enabled || !priv->current_assoc_ht.is_ht)
return -1;
- rc = 0;
tbl->is_dup = lq_data->is_dup;
tbl->lq_type = LQ_SISO;
tbl->action = 0;
@@ -1019,14 +995,14 @@
tbl->current_rate.rate_n_flags, is_green);
#endif /*CONFIG_IWLWIFI_HT */
- return rc;
+ return 0;
}
static int rs_move_legacy_other(struct iwl_priv *priv,
struct iwl_rate_scale_priv *lq_data,
int index)
{
- int rc = 0;
+ int ret = 0;
struct iwl_scale_tbl_info *tbl =
&(lq_data->lq_info[lq_data->active_tbl]);
struct iwl_scale_tbl_info *search_tbl =
@@ -1063,14 +1039,13 @@
search_tbl->lq_type = LQ_SISO;
search_tbl->is_SGI = 0;
search_tbl->is_fat = 0;
- rc = rs_switch_to_siso(priv, lq_data, search_tbl,
+ ret = rs_switch_to_siso(priv, lq_data, search_tbl,
index);
- if (!rc) {
+ if (!ret) {
lq_data->search_better_tbl = 1;
lq_data->action_counter = 0;
- }
- if (!rc)
goto out;
+ }
break;
case IWL_LEGACY_SWITCH_MIMO:
@@ -1080,14 +1055,13 @@
search_tbl->is_SGI = 0;
search_tbl->is_fat = 0;
search_tbl->antenna_type = ANT_BOTH;
- rc = rs_switch_to_mimo(priv, lq_data, search_tbl,
+ ret = rs_switch_to_mimo(priv, lq_data, search_tbl,
index);
- if (!rc) {
+ if (!ret) {
lq_data->search_better_tbl = 1;
lq_data->action_counter = 0;
- }
- if (!rc)
goto out;
+ }
break;
}
tbl->action++;
@@ -1112,7 +1086,7 @@
struct iwl_rate_scale_priv *lq_data,
int index)
{
- int rc = -1;
+ int ret;
u8 is_green = lq_data->is_green;
struct iwl_scale_tbl_info *tbl =
&(lq_data->lq_info[lq_data->active_tbl]);
@@ -1150,13 +1124,12 @@
search_tbl->is_SGI = 0;
search_tbl->is_fat = 0;
search_tbl->antenna_type = ANT_BOTH;
- rc = rs_switch_to_mimo(priv, lq_data, search_tbl,
+ ret = rs_switch_to_mimo(priv, lq_data, search_tbl,
index);
- if (!rc)
+ if (!ret) {
lq_data->search_better_tbl = 1;
-
- if (!rc)
goto out;
+ }
break;
case IWL_SISO_SWITCH_GI:
IWL_DEBUG_HT("LQ: SISO SWITCH TO GI\n");
@@ -1203,7 +1176,7 @@
struct iwl_rate_scale_priv *lq_data,
int index)
{
- int rc = -1;
+ int ret;
s8 is_green = lq_data->is_green;
struct iwl_scale_tbl_info *tbl =
&(lq_data->lq_info[lq_data->active_tbl]);
@@ -1228,9 +1201,9 @@
else
search_tbl->antenna_type = ANT_AUX;
- rc = rs_switch_to_siso(priv, lq_data, search_tbl,
+ ret = rs_switch_to_siso(priv, lq_data, search_tbl,
index);
- if (!rc) {
+ if (!ret) {
lq_data->search_better_tbl = 1;
goto out;
}