qcacld-3.0: Reuse preample type, vht_sig_a_1 and vht_sig_a_1

In monitor mode, current implementation
uses the preample type, vht_sig_a_1 and vht_sig_a_1
values associated with each mpdu, instead of reusing
the values from the first mpdu, to calculate data rates.

This is causing incorrect rates to be recorded in monitor mode logs
Reuse preample type, vht_sig_a_1 and vht_sig_a_1 of first
mpdu till the last mpdu is reached.

Change-Id: Ia6e5c1b3b0cc8d8b27f16cdfbd469fdba5c4a8f2
CRs-Fixed: 2276766

core/dp/htt/htt_monitor_rx.c

@@ -523,6 +523,9 @@ int htt_rx_mon_amsdu_rx_in_order_pop_ll(htt_pdev_handle pdev,
 	uint32_t len;
 	uint32_t last_frag;
 	qdf_dma_addr_t paddr;
+	static uint8_t preamble_type;
+	static uint32_t vht_sig_a_1;
+	static uint32_t vht_sig_a_2;
 
 	HTT_ASSERT1(htt_rx_in_order_ring_elems(pdev) != 0);
 
@@ -596,6 +599,33 @@ int htt_rx_mon_amsdu_rx_in_order_pop_ll(htt_pdev_handle pdev,
 		prev = msdu;
 
 		HTT_PKT_DUMP(htt_print_rx_desc(rx_desc));
+
+		/*
+		 * Only the first mpdu has valid preamble type, so use it
+		 * till the last mpdu is reached
+		 */
+		if (rx_desc->attention.first_mpdu) {
+			preamble_type = rx_desc->ppdu_start.preamble_type;
+			if (preamble_type == 8 || preamble_type == 9 ||
+			    preamble_type == 0x0c || preamble_type == 0x0d) {
+				vht_sig_a_1 = VHT_SIG_A_1(rx_desc);
+				vht_sig_a_2 = VHT_SIG_A_2(rx_desc);
+			}
+		} else {
+			rx_desc->ppdu_start.preamble_type = preamble_type;
+			if (preamble_type == 8 || preamble_type == 9 ||
+			    preamble_type == 0x0c || preamble_type == 0x0d) {
+				VHT_SIG_A_1(rx_desc) = vht_sig_a_1;
+				VHT_SIG_A_2(rx_desc) = vht_sig_a_2;
+			}
+		}
+
+		if (rx_desc->attention.last_mpdu) {
+			preamble_type = 0;
+			vht_sig_a_1 = 0;
+			vht_sig_a_2 = 0;
+		}
+
 		/*
 		 * Make the netbuf's data pointer point to the payload rather
 		 * than the descriptor.