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iwlwifi: warn when send tx power settings during scan 

Add WARN_ONCE when scanning is pending. Use STATUS_SCAN_HW bit since we
can have scan canceled or completed but STATUS_SCANNING bit still set.

v1 -> v2: replace EIO to EAGAIN

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Acked-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stanislaw Gruszka 2010-10-25 10:34:50 +02:00 committed by John W. Linville
parent c7317e41df
commit 4beeba7dc5
3 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/net/wireless/iwlwifi/iwl-3945.c
View File

@ -1451,6 +1451,10 @@ static int iwl3945_send_tx_power(struct iwl_priv *priv)
};
u16 chan;
if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
"TX Power requested while scanning!\n"))
return -EAGAIN;
chan = le16_to_cpu(priv->contexts[IWL_RXON_CTX_BSS].active.channel);
txpower.band = (priv->band == IEEE80211_BAND_5GHZ) ? 0 : 1;

8
drivers/net/wireless/iwlwifi/iwl-4965.c
View File

@ -1377,13 +1377,9 @@ static int iwl4965_send_tx_power(struct iwl_priv *priv)
u8 ctrl_chan_high = 0;
struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
if (test_bit(STATUS_SCANNING, &priv->status)) {
/* If this gets hit a lot, switch it to a BUG() and catch
* the stack trace to find out who is calling this during
* a scan. */
IWL_WARN(priv, "TX Power requested while scanning!\n");
if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
"TX Power requested while scanning!\n"))
return -EAGAIN;
}
band = priv->band == IEEE80211_BAND_2GHZ;

4
drivers/net/wireless/iwlwifi/iwl-agn-lib.c
View File

@ -496,6 +496,10 @@ int iwlagn_send_tx_power(struct iwl_priv *priv)
struct iwlagn_tx_power_dbm_cmd tx_power_cmd;
u8 tx_ant_cfg_cmd;
if (WARN_ONCE(test_bit(STATUS_SCAN_HW, &priv->status),
"TX Power requested while scanning!\n"))
return -EAGAIN;
/* half dBm need to multiply */
tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt);