Commit e3139fe7 authored by Wey-Yi Guy's avatar Wey-Yi Guy Committed by John W. Linville

iwlwifi: revert to active table when rate is not valid

When performing rate scaling, if detected that the new rate
index is invalid, clear the search_better_tbl flag
so it will not be stuck in the loop.

Since the search table is already set up in uCode,
we need to empty out the the search table;
revert back to the "active" rate and throughput info.
Also pass the "active" table setup to uCode to make
sure the rate scale is functioning correctly.
Signed-off-by: default avatarWey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: default avatarReinette Chatre <reinette.chatre@intel.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 21f5fc75
......@@ -2002,6 +2002,25 @@ static void rs_stay_in_table(struct iwl_lq_sta *lq_sta)
}
}
/*
* setup rate table in uCode
* return rate_n_flags as used in the table
*/
static u32 rs_update_rate_tbl(struct iwl_priv *priv,
struct iwl_lq_sta *lq_sta,
struct iwl_scale_tbl_info *tbl,
int index, u8 is_green)
{
u32 rate;
/* Update uCode's rate table. */
rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
rs_fill_link_cmd(priv, lq_sta, rate);
iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
return rate;
}
/*
* Do rate scaling and search for new modulation mode.
*/
......@@ -2098,6 +2117,16 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
if (!((1 << index) & rate_scale_index_msk)) {
IWL_ERR(priv, "Current Rate is not valid\n");
if (lq_sta->search_better_tbl) {
/* revert to active table if search table is not valid*/
tbl->lq_type = LQ_NONE;
lq_sta->search_better_tbl = 0;
tbl = &(lq_sta->lq_info[lq_sta->active_tbl]);
/* get "active" rate info */
index = iwl_hwrate_to_plcp_idx(tbl->current_rate);
rate = rs_update_rate_tbl(priv, lq_sta,
tbl, index, is_green);
}
return;
}
......@@ -2308,11 +2337,9 @@ static void rs_rate_scale_perform(struct iwl_priv *priv,
lq_update:
/* Replace uCode's rate table for the destination station. */
if (update_lq) {
rate = rate_n_flags_from_tbl(priv, tbl, index, is_green);
rs_fill_link_cmd(priv, lq_sta, rate);
iwl_send_lq_cmd(priv, &lq_sta->lq, CMD_ASYNC);
}
if (update_lq)
rate = rs_update_rate_tbl(priv, lq_sta,
tbl, index, is_green);
/* Should we stay with this modulation mode, or search for a new one? */
rs_stay_in_table(lq_sta);
......
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