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[59/65] staging: wfx: ensure that packet_id is unique

Message ID 20200115121041.10863-60-Jerome.Pouiller@silabs.com (mailing list archive)
State Not Applicable
Delegated to: Johannes Berg
Headers show
Series Simplify and improve the wfx driver | expand

Commit Message

Jérôme Pouiller Jan. 15, 2020, 12:13 p.m. UTC 
From: Jérôme Pouiller <jerome.pouiller@silabs.com>

In current code, packet_id is derivated from mac802.11 packet sequence
number, but this number is only unique for a station. It is not
sufficient.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/data_tx.c | 8 ++++++--
 drivers/staging/wfx/wfx.h     | 1 +
 2 files changed, 7 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/staging/wfx/data_tx.c b/drivers/staging/wfx/data_tx.c
index c32994553633..20f4740734f2 100644
--- a/drivers/staging/wfx/data_tx.c
+++ b/drivers/staging/wfx/data_tx.c
@@ -469,8 +469,12 @@  static int wfx_tx_inner(struct wfx_vif *wvif, struct ieee80211_sta *sta,
 
 	// Fill tx request
 	req = (struct hif_req_tx *)hif_msg->body;
-	req->packet_id = queue_id << 16 |
-			 IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl));
+	// packet_id just need to be unique on device. 32bits are more than
+	// necessary for that task, so we tae advantage of it to add some extra
+	// data for debug.
+	req->packet_id = queue_id << 28 |
+			 IEEE80211_SEQ_TO_SN(le16_to_cpu(hdr->seq_ctrl)) << 16 |
+			 (atomic_add_return(1, &wvif->wdev->packet_id) & 0xFFFF);
 	req->data_flags.fc_offset = offset;
 	if (tx_info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM)
 		req->data_flags.after_dtim = 1;
diff --git a/drivers/staging/wfx/wfx.h b/drivers/staging/wfx/wfx.h
index 5d61946e33e0..8b85bb1abb9c 100644
--- a/drivers/staging/wfx/wfx.h
+++ b/drivers/staging/wfx/wfx.h
@@ -54,6 +54,7 @@  struct wfx_dev {
 	int			tx_burst_idx;
 	atomic_t		tx_lock;
 
+	atomic_t		packet_id;
 	u32			key_map;
 	struct hif_req_add_key	keys[MAX_KEY_ENTRIES];