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-rw-r--r--package/kernel/mac80211/patches/650-0015-rtl8xxxu-Make-DMA-aggregation-optional-by-setting-a-.patch54
1 files changed, 54 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/650-0015-rtl8xxxu-Make-DMA-aggregation-optional-by-setting-a-.patch b/package/kernel/mac80211/patches/650-0015-rtl8xxxu-Make-DMA-aggregation-optional-by-setting-a-.patch
new file mode 100644
index 0000000000..878cb62383
--- /dev/null
+++ b/package/kernel/mac80211/patches/650-0015-rtl8xxxu-Make-DMA-aggregation-optional-by-setting-a-.patch
@@ -0,0 +1,54 @@
+From 0640e5cd53bc004be1a9a1af6d340baab44d9351 Mon Sep 17 00:00:00 2001
+From: Jes Sorensen <Jes.Sorensen@redhat.com>
+Date: Thu, 16 Jun 2016 14:46:05 -0400
+Subject: [PATCH] rtl8xxxu: Make DMA aggregation optional by setting a module
+ parameter
+
+Let the default to off until we have more data on the right default
+tuning values.
+
+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
+@@ -44,6 +44,7 @@
+
+ int rtl8xxxu_debug = RTL8XXXU_DEBUG_EFUSE;
+ static bool rtl8xxxu_ht40_2g;
++static bool rtl8xxxu_dma_aggregation;
+
+ MODULE_AUTHOR("Jes Sorensen <Jes.Sorensen@redhat.com>");
+ MODULE_DESCRIPTION("RTL8XXXu USB mac80211 Wireless LAN Driver");
+@@ -62,6 +63,8 @@ module_param_named(debug, rtl8xxxu_debug
+ MODULE_PARM_DESC(debug, "Set debug mask");
+ module_param_named(ht40_2g, rtl8xxxu_ht40_2g, bool, 0600);
+ MODULE_PARM_DESC(ht40_2g, "Enable HT40 support on the 2.4GHz band");
++module_param_named(dma_aggregation, rtl8xxxu_dma_aggregation, bool, 0600);
++MODULE_PARM_DESC(dma_aggregation, "Enable DMA packet aggregation");
+
+ #define USB_VENDOR_ID_REALTEK 0x0bda
+ #define RTL8XXXU_RX_URBS 32
+@@ -4411,14 +4414,18 @@ void rtl8xxxu_gen1_init_aggregation(stru
+
+ usb_spec = rtl8xxxu_read8(priv, REG_USB_SPECIAL_OPTION);
+ usb_spec &= ~USB_SPEC_USB_AGG_ENABLE;
++ rtl8xxxu_write8(priv, REG_USB_SPECIAL_OPTION, usb_spec);
+
+ agg_ctrl = rtl8xxxu_read8(priv, REG_TRXDMA_CTRL);
+ agg_ctrl &= ~TRXDMA_CTRL_RXDMA_AGG_EN;
+
+- agg_ctrl |= TRXDMA_CTRL_RXDMA_AGG_EN;
++ if (!rtl8xxxu_dma_aggregation) {
++ rtl8xxxu_write8(priv, REG_TRXDMA_CTRL, agg_ctrl);
++ return;
++ }
+
++ agg_ctrl |= TRXDMA_CTRL_RXDMA_AGG_EN;
+ rtl8xxxu_write8(priv, REG_TRXDMA_CTRL, agg_ctrl);
+- rtl8xxxu_write8(priv, REG_USB_SPECIAL_OPTION, usb_spec);
+
+ /*
+ * The number of packets we can take looks to be buffer size / 512