rtl8xxxu: disable interrupt_in transfer for 8188cu and 8192cu

There will be crazy numbers of interrupts triggered by 8188cu and
8192cu module, around 8000~10000 interrupts per second, on the usb
host controller. Compare with the vendor driver source code, it's
mapping to the configuration CONFIG_USB_INTERRUPT_IN_PIPE and it is
disabled by default.

Since the interrupt transfer is neither used for TX/RX nor H2C
commands. Disable it to avoid the excessive amount of interrupts
for the 8188cu and 8192cu module which I only have for verification.

Signed-off-by: Chris Chiu <chris.chiu@canonical.com>
Tested-by: reto.schneider@husqvarnagroup.com
Acked-by: Jes Sorensen <Jes.Sorensen@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210701163354.118403-1-chris.chiu@canonical.com

diff --git a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
index ac1061caacd653077f933c5f6b1ed530e63728fb..0827be68d073c30bbd6d9ae5eba320d4176a4ecd 100644 (file)
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
+++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c
@@ -1670,7 +1670,7 @@ static int rtl8xxxu_identify_chip(struct rtl8xxxu_priv *priv)
                        priv->rf_paths = 2;
                        priv->rx_paths = 2;
                        priv->tx_paths = 2;
-                       priv->usb_interrupts = 1;
+                       priv->usb_interrupts = 0;
                        priv->rtl_chip = RTL8192C;
                }
                priv->has_wifi = 1;
@@ -1680,7 +1680,7 @@ static int rtl8xxxu_identify_chip(struct rtl8xxxu_priv *priv)
                priv->rx_paths = 1;
                priv->tx_paths = 1;
                priv->rtl_chip = RTL8188C;
-               priv->usb_interrupts = 1;
+               priv->usb_interrupts = 0;
                priv->has_wifi = 1;
        }