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[v2,07/55] staging: wfx: ensure that retry policy always fallbacks to MCS0 / 1Mbps

Message ID 20191217161318.31402-8-Jerome.Pouiller@silabs.com
State Not Applicable
Delegated to: David Miller
Headers show
Series Improve wfx driver | expand

Commit Message

Jérôme Pouiller Dec. 17, 2019, 4:14 p.m. UTC 
From: Jérôme Pouiller <jerome.pouiller@silabs.com>

When not using HT mode, minstrel always includes 1Mbps as fallback rate.
But, when using HT mode, this fallback is not included. Yet, it seems
that it could save some frames. So, this patch add it unconditionally.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
---
 drivers/staging/wfx/data_tx.c | 11 +++++++++++
 1 file changed, 11 insertions(+)
diff mbox series

Patch

diff --git a/drivers/staging/wfx/data_tx.c b/drivers/staging/wfx/data_tx.c
index 46ad83b95f52..738a6ca5edad 100644
--- a/drivers/staging/wfx/data_tx.c
+++ b/drivers/staging/wfx/data_tx.c
@@ -538,6 +538,17 @@  static void wfx_tx_fixup_rates(struct ieee80211_tx_rate *rates)
 			}
 		}
 	} while (!finished);
+	// Ensure that MCS0 or 1Mbps is present at the end of the retry list
+	for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
+		if (rates[i].idx == 0)
+			break;
+		if (rates[i].idx == -1) {
+			rates[i].idx = 0;
+			rates[i].count = 8; // == hw->max_rate_tries
+			rates[i].flags = rates[i - 1].flags & IEEE80211_TX_RC_MCS;
+			break;
+		}
+	}
 	// All retries use long GI
 	for (i = 1; i < IEEE80211_TX_MAX_RATES; i++)
 		rates[i].flags &= ~IEEE80211_TX_RC_SHORT_GI;