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From 48c31d0cdbadc082abfcf88c2bd161fab4000bb4 Mon Sep 17 00:00:00 2001
From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Sat, 21 May 2016 13:43:51 -0400
Subject: [PATCH] rtl8xxxu: Allocate larger RX skbs when aggregation is enabled
This adds support for allocating larger skbs for devices which
indicate they support it.
Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
---
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h | 2 ++
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 13 +++++++++----
2 files changed, 11 insertions(+), 4 deletions(-)
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
@@ -1247,6 +1247,7 @@ struct rtl8xxxu_priv {
u32 ep_tx_normal_queue:1;
u32 ep_tx_low_queue:1;
u32 has_xtalk:1;
+ u32 rx_buf_aggregation:1;
u8 xtalk;
unsigned int pipe_interrupt;
unsigned int pipe_in;
@@ -1330,6 +1331,7 @@ struct rtl8xxxu_fileops {
void (*report_connect) (struct rtl8xxxu_priv *priv,
u8 macid, bool connect);
int writeN_block_size;
+ int rx_agg_buf_size;
char tx_desc_size;
char rx_desc_size;
char has_s0s1;
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -64,8 +64,6 @@ module_param_named(ht40_2g, rtl8xxxu_ht4
MODULE_PARM_DESC(ht40_2g, "Enable HT40 support on the 2.4GHz band");
#define USB_VENDOR_ID_REALTEK 0x0bda
-/* Minimum IEEE80211_MAX_FRAME_LEN */
-#define RTL_RX_BUFFER_SIZE IEEE80211_MAX_FRAME_LEN
#define RTL8XXXU_RX_URBS 32
#define RTL8XXXU_RX_URB_PENDING_WATER 8
#define RTL8XXXU_TX_URBS 64
@@ -5271,12 +5269,19 @@ cleanup:
static int rtl8xxxu_submit_rx_urb(struct rtl8xxxu_priv *priv,
struct rtl8xxxu_rx_urb *rx_urb)
{
+ struct rtl8xxxu_fileops *fops = priv->fops;
struct sk_buff *skb;
int skb_size;
int ret, rx_desc_sz;
- rx_desc_sz = priv->fops->rx_desc_size;
- skb_size = rx_desc_sz + RTL_RX_BUFFER_SIZE;
+ rx_desc_sz = fops->rx_desc_size;
+
+ if (priv->rx_buf_aggregation && fops->rx_agg_buf_size)
+ skb_size = fops->rx_agg_buf_size;
+ else
+ skb_size = IEEE80211_MAX_FRAME_LEN;
+ skb_size += rx_desc_sz;
+
skb = __netdev_alloc_skb(NULL, skb_size, GFP_KERNEL);
if (!skb)
return -ENOMEM;
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