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iwlwifi: fix for channel switch

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Different channel has different configuration, need to pass correct
configuration to uCode when send "channel switch" command to uCode.
Invalid configuration will cause sysassert in uCode and produce
un-expected result.

Even it is a very small windows, but we also need to consider and handle
the case if commit_rxon occurred before the "channel switch
announcement" notification received from uCode.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Wey-Yi Guy 2009-11-06 14:52:54 -08:00 committed by John W. Linville
parent 681988653e
commit 0924e519a3
6 changed files with 68 additions and 25 deletions
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12
drivers/net/wireless/iwlwifi/iwl-4965.c
View File

@ -1449,14 +1449,14 @@ static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
is_ht40 = is_ht40_channel(priv->staging_rxon.flags);
if (is_ht40 &&
(priv->active_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
(priv->staging_rxon.flags & RXON_FLG_CTRL_CHANNEL_LOC_HI_MSK))
ctrl_chan_high = 1;
cmd.band = band;
cmd.expect_beacon = 0;
cmd.channel = cpu_to_le16(channel);
cmd.rxon_flags = priv->active_rxon.flags;
cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
cmd.rxon_flags = priv->staging_rxon.flags;
cmd.rxon_filter_flags = priv->staging_rxon.filter_flags;
cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
if (ch_info)
cmd.expect_beacon = is_channel_radar(ch_info);
@ -1473,8 +1473,10 @@ static int iwl4965_hw_channel_switch(struct iwl_priv *priv, u16 channel)
return rc;
}
rc = iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
return rc;
priv->switch_rxon.channel = cpu_to_le16(channel);
priv->switch_rxon.switch_in_progress = true;
return iwl_send_cmd_pdu(priv, REPLY_CHANNEL_SWITCH, sizeof(cmd), &cmd);
}
/**

6
drivers/net/wireless/iwlwifi/iwl-5000.c
View File

@ -1391,8 +1391,8 @@ static int iwl5000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
priv->active_rxon.channel, channel);
cmd.band = priv->band == IEEE80211_BAND_2GHZ;
cmd.channel = cpu_to_le16(channel);
cmd.rxon_flags = priv->active_rxon.flags;
cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
cmd.rxon_flags = priv->staging_rxon.flags;
cmd.rxon_filter_flags = priv->staging_rxon.filter_flags;
cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
ch_info = iwl_get_channel_info(priv, priv->band, channel);
if (ch_info)
@ -1402,6 +1402,8 @@ static int iwl5000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
priv->active_rxon.channel, channel);
return -EFAULT;
}
priv->switch_rxon.channel = cpu_to_le16(channel);
priv->switch_rxon.switch_in_progress = true;
return iwl_send_cmd_sync(priv, &hcmd);
}

6
drivers/net/wireless/iwlwifi/iwl-6000.c
View File

@ -186,8 +186,8 @@ static int iwl6000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
cmd.band = priv->band == IEEE80211_BAND_2GHZ;
cmd.channel = cpu_to_le16(channel);
cmd.rxon_flags = priv->active_rxon.flags;
cmd.rxon_filter_flags = priv->active_rxon.filter_flags;
cmd.rxon_flags = priv->staging_rxon.flags;
cmd.rxon_filter_flags = priv->staging_rxon.filter_flags;
cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
ch_info = iwl_get_channel_info(priv, priv->band, channel);
if (ch_info)
@ -197,6 +197,8 @@ static int iwl6000_hw_channel_switch(struct iwl_priv *priv, u16 channel)
priv->active_rxon.channel, channel);
return -EFAULT;
}
priv->switch_rxon.channel = cpu_to_le16(channel);
priv->switch_rxon.switch_in_progress = true;
return iwl_send_cmd_sync(priv, &hcmd);
}

11
drivers/net/wireless/iwlwifi/iwl-agn.c
View File

@ -122,6 +122,17 @@ int iwl_commit_rxon(struct iwl_priv *priv)
return -EINVAL;
}
/*
* receive commit_rxon request
* abort any previous channel switch if still in process
*/
if (priv->switch_rxon.switch_in_progress &&
(priv->switch_rxon.channel != priv->staging_rxon.channel)) {
IWL_DEBUG_11H(priv, "abort channel switch on %d\n",
le16_to_cpu(priv->switch_rxon.channel));
priv->switch_rxon.switch_in_progress = false;
}
/* If we don't need to send a full RXON, we can use
* iwl_rxon_assoc_cmd which is used to reconfigure filter
* and other flags for the current radio configuration. */

45
drivers/net/wireless/iwlwifi/iwl-core.c
View File

@ -1316,14 +1316,19 @@ void iwl_rx_csa(struct iwl_priv *priv, struct iwl_rx_mem_buffer *rxb)
struct iwl_rxon_cmd *rxon = (void *)&priv->active_rxon;
struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
if (!le32_to_cpu(csa->status)) {
rxon->channel = csa->channel;
priv->staging_rxon.channel = csa->channel;
IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
le16_to_cpu(csa->channel));
} else
IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
le16_to_cpu(csa->channel));
if (priv->switch_rxon.switch_in_progress) {
if (!le32_to_cpu(csa->status) &&
(csa->channel == priv->switch_rxon.channel)) {
rxon->channel = csa->channel;
priv->staging_rxon.channel = csa->channel;
IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
le16_to_cpu(csa->channel));
} else
IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
le16_to_cpu(csa->channel));
priv->switch_rxon.switch_in_progress = false;
}
}
EXPORT_SYMBOL(iwl_rx_csa);
@ -2690,14 +2695,6 @@ int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
goto set_ch_out;
}
if (iwl_is_associated(priv) &&
(le16_to_cpu(priv->active_rxon.channel) != ch) &&
priv->cfg->ops->lib->set_channel_switch) {
ret = priv->cfg->ops->lib->set_channel_switch(priv,
ch);
goto out;
}
spin_lock_irqsave(&priv->lock, flags);
/* Configure HT40 channels */
@ -2732,6 +2729,22 @@ int iwl_mac_config(struct ieee80211_hw *hw, u32 changed)
iwl_set_flags_for_band(priv, conf->channel->band);
spin_unlock_irqrestore(&priv->lock, flags);
if (iwl_is_associated(priv) &&
(le16_to_cpu(priv->active_rxon.channel) != ch) &&
priv->cfg->ops->lib->set_channel_switch) {
iwl_set_rate(priv);
/*
* at this point, staging_rxon has the
* configuration for channel switch
*/
ret = priv->cfg->ops->lib->set_channel_switch(priv,
ch);
if (!ret) {
iwl_print_rx_config_cmd(priv);
goto out;
}
priv->switch_rxon.switch_in_progress = false;
}
set_ch_out:
/* The list of supported rates and rate mask can be different
* for each band; since the band may have changed, reset

13
drivers/net/wireless/iwlwifi/iwl-dev.h
View File

@ -994,6 +994,17 @@ struct traffic_stats {
};
#endif
/*
* iwl_switch_rxon: "channel switch" structure
*
* @ switch_in_progress: channel switch in progress
* @ channel: new channel
*/
struct iwl_switch_rxon {
bool switch_in_progress;
__le16 channel;
};
struct iwl_priv {
/* ieee device used by generic ieee processing code */
@ -1087,6 +1098,8 @@ struct iwl_priv {
const struct iwl_rxon_cmd active_rxon;
struct iwl_rxon_cmd staging_rxon;
struct iwl_switch_rxon switch_rxon;
/* 1st responses from initialize and runtime uCode images.
* 4965's initialize alive response contains some calibration data. */
struct iwl_init_alive_resp card_alive_init;