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iwlwifi: validate enhanced tx power entry

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Validate enhanced tx power entry read from EEPROM before applying the
tx power value. Different versions of EEPROM might contain different size
of table; always a good idea to make sure the entry is valid before
applying to the targeted channel.

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
2009-11-13 11:56:23 -08:00
committed by John W. Linville
parent dfef948ed2
commit 85f0d9e877
2 changed files with 14 additions and 2 deletions
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10
drivers/net/wireless/iwlwifi/iwl-eeprom.c
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@@ -913,6 +913,16 @@ void iwlcore_eeprom_enhanced_txpower(struct iwl_priv *priv)
enhanced_txpower = (struct iwl_eeprom_enhanced_txpwr *)
iwl_eeprom_query_addr(priv, offset);
/*
* check for valid entry -
* different version of EEPROM might contain different set
* of enhanced tx power table
* always check for valid entry before process
* the information
*/
if (!enhanced_txpower->common || enhanced_txpower->reserved)
continue;
for (element = 0; element < eeprom_section_count; element++) {
if (enhinfo[section].is_common)
max_txpower_avg =