From: Emmanuel Grumbach Date: Thu, 2 Jul 2015 11:53:02 +0000 (+0300) Subject: iwlwifi: pcie: don't warn on long MPDUs when supported X-Git-Tag: v4.3-rc1~96^2~124^2~42^2~21 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=31f920b63ae8ff5bf278a00dd8478e58ed89ff95;p=karo-tx-linux.git iwlwifi: pcie: don't warn on long MPDUs when supported In iwlmvm firmwares, the Byte count written in the scheduler byte count table is in DWORDs and not in bytes. We should check that this value fits in the 12 bits and the value can be either in bits of in DWORD or bytes depending on the firmware. Check the value after the translation to DWORDs is done (if needed). Signed-off-by: Emmanuel Grumbach --- diff --git a/drivers/net/wireless/iwlwifi/pcie/tx.c b/drivers/net/wireless/iwlwifi/pcie/tx.c index c6572ffb8ae2..90d02d5f4881 100644 --- a/drivers/net/wireless/iwlwifi/pcie/tx.c +++ b/drivers/net/wireless/iwlwifi/pcie/tx.c @@ -219,8 +219,6 @@ static void iwl_pcie_txq_update_byte_cnt_tbl(struct iwl_trans *trans, scd_bc_tbl = trans_pcie->scd_bc_tbls.addr; - WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX); - sta_id = tx_cmd->sta_id; sec_ctl = tx_cmd->sec_ctl; @@ -239,6 +237,9 @@ static void iwl_pcie_txq_update_byte_cnt_tbl(struct iwl_trans *trans, if (trans_pcie->bc_table_dword) len = DIV_ROUND_UP(len, 4); + if (WARN_ON(len > 0xFFF || write_ptr >= TFD_QUEUE_SIZE_MAX)) + return; + bc_ent = cpu_to_le16(len | (sta_id << 12)); scd_bc_tbl[txq_id].tfd_offset[write_ptr] = bc_ent;