[PATCH AUTOSEL 4.19 062/219] iwlwifi: pcie: set cmd_len in the correct place

Sasha Levin
2019-11-22T06:27:49Z

From: Sara Sharon <sara.sharon@intel.com>

[ Upstream commit 956343a61226e1af3d146386f70a059feb567d0c ]

command len is set too early in the code, since when building
AMSDU, the size changes. This causes the byte count table to
have the wrong size.

Fixes: a0ec0169b7a9 ("iwlwifi: support new tx api")
Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../net/wireless/intel/iwlwifi/pcie/tx-gen2.c | 24 +++++++++----------
1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c b/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c
index b99f33ff91230..a9e42f0437ccb 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/tx-gen2.c
@@ -555,18 +555,6 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,

spin_lock(&txq->lock);

- if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) {
- struct iwl_tx_cmd_gen3 *tx_cmd_gen3 =
- (void *)dev_cmd->payload;
-
- cmd_len = le16_to_cpu(tx_cmd_gen3->len);
- } else {
- struct iwl_tx_cmd_gen2 *tx_cmd_gen2 =
- (void *)dev_cmd->payload;
-
- cmd_len = le16_to_cpu(tx_cmd_gen2->len);
- }
-
if (iwl_queue_space(trans, txq) < txq->high_mark) {
iwl_stop_queue(trans, txq);

@@ -604,6 +592,18 @@ int iwl_trans_pcie_gen2_tx(struct iwl_trans *trans, struct sk_buff *skb,
return -1;
}

+ if (trans->cfg->device_family >= IWL_DEVICE_FAMILY_22560) {
+ struct iwl_tx_cmd_gen3 *tx_cmd_gen3 =
+ (void *)dev_cmd->payload;
+
+ cmd_len = le16_to_cpu(tx_cmd_gen3->len);
+ } else {
+ struct iwl_tx_cmd_gen2 *tx_cmd_gen2 =
+ (void *)dev_cmd->payload;
+
+ cmd_len = le16_to_cpu(tx_cmd_gen2->len);
+ }
+
/* Set up entry for this TFD in Tx byte-count array */
iwl_pcie_gen2_update_byte_tbl(trans_pcie, txq, cmd_len,
iwl_pcie_gen2_get_num_tbs(trans, tfd));
--
2.20.1