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iwlwifi: add debug print for parsing firmware TLV

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When parsing TLV during loading firmware, if encounter any TLV error,
log the error message to help debugging.

Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
This commit is contained in:
Wey-Yi Guy 2010-06-22 14:31:45 -07:00
parent c04f9f2203
commit ad8d8333b1
1 changed files with 63 additions and 38 deletions
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73
drivers/net/wireless/iwlwifi/iwl-agn.c
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@ -1806,12 +1806,21 @@ static int iwlagn_load_firmware(struct iwl_priv *priv,
const u8 *data;
int wanted_alternative = iwlagn_wanted_ucode_alternative, tmp;
u64 alternatives;
u32 tlv_len;
enum iwl_ucode_tlv_type tlv_type;
const u8 *tlv_data;
int ret = 0;
if (len < sizeof(*ucode))
if (len < sizeof(*ucode)) {
IWL_ERR(priv, "uCode has invalid length: %zd\n", len);
return -EINVAL;
}
if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC))
if (ucode->magic != cpu_to_le32(IWL_TLV_UCODE_MAGIC)) {
IWL_ERR(priv, "invalid uCode magic: 0X%x\n",
le32_to_cpu(ucode->magic));
return -EINVAL;
}
/*
* Check which alternatives are present, and "downgrade"
@ -1836,11 +1845,9 @@ static int iwlagn_load_firmware(struct iwl_priv *priv,
len -= sizeof(*ucode);
while (len >= sizeof(*tlv)) {
u32 tlv_len;
enum iwl_ucode_tlv_type tlv_type;
while (len >= sizeof(*tlv) && !ret) {
u16 tlv_alt;
const u8 *tlv_data;
u32 fixed_tlv_size = 4;
len -= sizeof(*tlv);
tlv = (void *)data;
@ -1850,8 +1857,11 @@ static int iwlagn_load_firmware(struct iwl_priv *priv,
tlv_alt = le16_to_cpu(tlv->alternative);
tlv_data = tlv->data;
if (len < tlv_len)
if (len < tlv_len) {
IWL_ERR(priv, "invalid TLV len: %zd/%u\n",
len, tlv_len);
return -EINVAL;
}
len -= ALIGN(tlv_len, 4);
data += sizeof(*tlv) + ALIGN(tlv_len, 4);
@ -1885,56 +1895,71 @@ static int iwlagn_load_firmware(struct iwl_priv *priv,
pieces->boot_size = tlv_len;
break;
case IWL_UCODE_TLV_PROBE_MAX_LEN:
if (tlv_len != 4)
return -EINVAL;
if (tlv_len != fixed_tlv_size)
ret = -EINVAL;
else
capa->max_probe_length =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_INIT_EVTLOG_PTR:
if (tlv_len != 4)
return -EINVAL;
if (tlv_len != fixed_tlv_size)
ret = -EINVAL;
else
pieces->init_evtlog_ptr =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_INIT_EVTLOG_SIZE:
if (tlv_len != 4)
return -EINVAL;
if (tlv_len != fixed_tlv_size)
ret = -EINVAL;
else
pieces->init_evtlog_size =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_INIT_ERRLOG_PTR:
if (tlv_len != 4)
return -EINVAL;
if (tlv_len != fixed_tlv_size)
ret = -EINVAL;
else
pieces->init_errlog_ptr =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_RUNT_EVTLOG_PTR:
if (tlv_len != 4)
return -EINVAL;
if (tlv_len != fixed_tlv_size)
ret = -EINVAL;
else
pieces->inst_evtlog_ptr =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_RUNT_EVTLOG_SIZE:
if (tlv_len != 4)
return -EINVAL;
if (tlv_len != fixed_tlv_size)
ret = -EINVAL;
else
pieces->inst_evtlog_size =
le32_to_cpup((__le32 *)tlv_data);
break;
case IWL_UCODE_TLV_RUNT_ERRLOG_PTR:
if (tlv_len != 4)
return -EINVAL;
if (tlv_len != fixed_tlv_size)
ret = -EINVAL;
else
pieces->inst_errlog_ptr =
le32_to_cpup((__le32 *)tlv_data);
break;
default:
IWL_WARN(priv, "unknown TLV: %d\n", tlv_type);
break;
}
}
if (len)
return -EINVAL;
if (len) {
IWL_ERR(priv, "invalid TLV after parsing: %zd\n", len);
iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)data, len);
ret = -EINVAL;
} else if (ret) {
IWL_ERR(priv, "TLV %d has invalid size: %u\n",
tlv_type, tlv_len);
iwl_print_hex_dump(priv, IWL_DL_FW, (u8 *)tlv_data, tlv_len);
}
return 0;
return ret;
}
/**