diff mbox series

[02/12] iwlwifi: mvm: handle RX checksum on Bz devices

Message ID iwlwifi.20211219121514.8ef59da4e05e.Ide87c2dc8fa08eae55c013a625f4ece5184b1b63@changeid
State New
Headers show
Series iwlwifi: updates intended for v5.17 2021-12-19 part 1 | expand

Commit Message

Luca Coelho Dec. 19, 2021, 10:18 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

On Bz devices, the hardware checksums including the SNAP header,
starting directly after the MAC header, so we don't need the
extra checks and can just pass the checksum to mac80211.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
---
 drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
index de36255997b5..5f73717f2f5f 100644
--- a/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/rxmq.c
@@ -172,8 +172,12 @@  static int iwl_mvm_create_skb(struct iwl_mvm *mvm, struct sk_buff *skb,
 	 * in the cases the hardware didn't handle, since it's rare to see
 	 * such packets, even though the hardware did calculate the checksum
 	 * in this case, just starting after the MAC header instead.
+	 *
+	 * Starting from Bz hardware, it calculates starting directly after
+	 * the MAC header, so that matches mac80211's expectation.
 	 */
-	if (skb->ip_summed == CHECKSUM_COMPLETE) {
+	if (skb->ip_summed == CHECKSUM_COMPLETE &&
+	    mvm->trans->trans_cfg->device_family < IWL_DEVICE_FAMILY_BZ) {
 		struct {
 			u8 hdr[6];
 			__be16 type;