wlan: Reduce Tx aggregation with Cisco AP in HT40 mode
Cisco AP has issues in receiving more than 25 "mpdu in ampdu"
causing very low throughput in HT40 case.
Currently at BA setup negotiation, DUT sends 0 window size in
AddBA request and Cisco responds with 64 which is causing
aggregate huge number of MPDUs.
DUT should send 25 as window size to force Cisco AP to
negotiate with lesser window size.
CRs-Fixed: 598667
Change-Id: Iab9887d55460d717999605fbdc78d48672e7baf9
diff --git a/CORE/MAC/src/pe/lim/limUtils.c b/CORE/MAC/src/pe/lim/limUtils.c
index c7565f9..8d285b9 100644
--- a/CORE/MAC/src/pe/lim/limUtils.c
+++ b/CORE/MAC/src/pe/lim/limUtils.c
@@ -88,6 +88,7 @@
//#define LIM_MAX_ACTIVE_SESSIONS 3 //defined temporarily for BT-AMP SUPPORT
#define SUCCESS 1 //defined temporarily for BT-AMP
+#define MAX_BA_WINDOW_SIZE_FOR_CISCO 25
/** -------------------------------------------------------------
\fn limAssignDialogueToken
\brief Assigns dialogue token.
@@ -5913,7 +5914,17 @@
// Requesting the ADDBA recipient to populate the size.
// If ADDBA is accepted, a non-zero buffer size should
// be returned in the ADDBA Rsp
- pMlmAddBAReq->baBufferSize = 0;
+ if ((TRUE == psessionEntry->isCiscoVendorAP) &&
+ (eHT_CHANNEL_WIDTH_80MHZ != pStaDs->htSupportedChannelWidthSet))
+ {
+ /* Cisco AP has issues in receiving more than 25 "mpdu in ampdu"
+ causing very low throughput in HT40 case */
+ limLog( pMac, LOGW,
+ FL( "Requesting ADDBA with Cisco 1225 AP, window size 25"));
+ pMlmAddBAReq->baBufferSize = MAX_BA_WINDOW_SIZE_FOR_CISCO;
+ }
+ else
+ pMlmAddBAReq->baBufferSize = 0;
limLog( pMac, LOGW,
FL( "Requesting an ADDBA to setup a %s BA session with STA %d for TID %d" ),