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iwlwifi: fix possible read attempt on ucode that is not available 

This fixes a NULL pointer dereference that can occur when the
ucode is not loaded at the time __iwl_up is called.

The problem was reported at http://kerneloops.org/raw.php?rawid=2765&msgid=

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Reinette Chatre 2008-01-21 10:08:31 -08:00 committed by David S. Miller
parent 1e34a11d55
commit a781cf94e6
2 changed files with 10 additions and 0 deletions
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5
drivers/net/wireless/iwlwifi/iwl3945-base.c
View File

@ -6342,6 +6342,11 @@ static int __iwl_up(struct iwl_priv *priv)
return 0;
}
if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
IWL_ERROR("ucode not available for device bringup\n");
return -EIO;
}
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
rc = iwl_hw_nic_init(priv);

5
drivers/net/wireless/iwlwifi/iwl4965-base.c
View File

@ -6698,6 +6698,11 @@ static int __iwl_up(struct iwl_priv *priv)
return 0;
}
if (!priv->ucode_data_backup.v_addr || !priv->ucode_data.v_addr) {
IWL_ERROR("ucode not available for device bringup\n");
return -EIO;
}
iwl_write32(priv, CSR_INT, 0xFFFFFFFF);
rc = iwl_hw_nic_init(priv);