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iwlwifi: fix kernel oops when ucode DMA memory allocation failure

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The patch fixes memcpy to NULL address when the ucode DMA allocation failure.

This is a fix to bug
http://www.intellinuxwireless.org/bugzilla/show_bug.cgi?id=1861

Signed-off-by: Zhu Yi <yi.zhu@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:
Zhu, Yi 2009-01-23 13:45:22 -08:00 committed by John W. Linville
parent eb83bbf574
commit 1f304e4e3b
1 changed files with 4 additions and 0 deletions
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4
drivers/net/wireless/iwlwifi/iwl-agn.c
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@ -1719,6 +1719,10 @@ static int iwl_read_ucode(struct iwl_priv *priv)
priv->ucode_data_backup.len = data_size;
iwl_alloc_fw_desc(priv->pci_dev, &priv->ucode_data_backup);
if (!priv->ucode_code.v_addr || !priv->ucode_data.v_addr ||
!priv->ucode_data_backup.v_addr)
goto err_pci_alloc;
/* Initialization instructions and data */
if (init_size && init_data_size) {
priv->ucode_init.len = init_size;