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path: root/package/kernel/mac80211/patches/650-0016-rtl8xxxu-gen1-Set-aggregation-timeout-REG_RXDMA_AGG_.patch
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From 0338642c5eeaaf03cd4a63e211b94596c559e6e5 Mon Sep 17 00:00:00 2001
From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Wed, 22 Jun 2016 22:09:35 -0400
Subject: [PATCH] rtl8xxxu: gen1: Set aggregation timeout (REG_RXDMA_AGG_PG_TH
 + 1) as well

gen2 chips as well as 8188eu seems to use this register for setting
DMA timeout threshold values, however the 8192cu is using
REG_USB_DMA_AGG_TO. Set both to be on the safe side.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
---
 drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -4410,7 +4410,7 @@ void rtl8xxxu_gen2_report_connect(struct
 
 void rtl8xxxu_gen1_init_aggregation(struct rtl8xxxu_priv *priv)
 {
-	u8 agg_ctrl, usb_spec, page_thresh;
+	u8 agg_ctrl, usb_spec, page_thresh, timeout;
 
 	usb_spec = rtl8xxxu_read8(priv, REG_USB_SPECIAL_OPTION);
 	usb_spec &= ~USB_SPEC_USB_AGG_ENABLE;
@@ -4442,7 +4442,14 @@ void rtl8xxxu_gen1_init_aggregation(stru
 
 	page_thresh = (priv->fops->rx_agg_buf_size / 512);
 	rtl8xxxu_write8(priv, REG_RXDMA_AGG_PG_TH, page_thresh);
-	rtl8xxxu_write8(priv, REG_USB_DMA_AGG_TO, 4);
+	/*
+	 * REG_RXDMA_AGG_PG_TH + 1 seems to be the timeout register on
+	 * gen2 chips and rtl8188eu. The rtl8723au seems unhappy if we
+	 * don't set it, so better set both.
+	 */
+	timeout = 4;
+	rtl8xxxu_write8(priv, REG_RXDMA_AGG_PG_TH + 1, timeout);
+	rtl8xxxu_write8(priv, REG_USB_DMA_AGG_TO, timeout);
 	priv->rx_buf_aggregation = 1;
 }