linux-kernel - [Bug] Various abnormal WiFi behaviors with Linux 3.8 on arm/imx23

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Date:	Mon, 4 Mar 2013 01:44:52 +0100
From:	Guan Xin <guanx.bac@...il.com>
To:	linux-kernel@...r.kernel.org
Subject: [Bug] Various abnormal WiFi behaviors with Linux 3.8 on arm/imx23

Hello,

I have just moved from Linux 3.7.x to Linux 3.8.x because 3.7.x is
EOL-ed. On an iMX233-OLinuXino-MICRO with USB WiFi adapters I got the
following problems which were never present in Linux 3.7.x.

Error 1:
At first I used a USB-WiFi adapter with the RTL8192CU chip. The
rtlwifi driver showed nothing wrong in dmesg. However, I could get
nothing when scanning for APs. It looks exactly like there are no AP
at all. Of course I could not associate with my AP either.
I also tried to use the manufacturer's driver, same problem.

Error 2:
Then I changed to use an adapter with the RT5370 chip. This time I got
scanning working. It can also associate with the AP and works as
expected. The problem is -- when I tried to add the wlan IF to a
bridge, I got this:
"can't add wlan0 to bridge br0: Operation not supported"

Here are some of my kernel config options:
CONFIG_RT2X00=m
CONFIG_RT2500USB=m
CONFIG_RT73USB=m
CONFIG_RT2800USB=m
CONFIG_RT2800USB_RT33XX=y
CONFIG_RT2800USB_RT35XX=y
CONFIG_RT2800USB_RT53XX=y
CONFIG_RT2800USB_UNKNOWN=y
CONFIG_RT2800_LIB=m
CONFIG_RT2X00_LIB_USB=m
CONFIG_RT2X00_LIB=m
CONFIG_RT2X00_LIB_FIRMWARE=y
CONFIG_RT2X00_LIB_CRYPTO=y
CONFIG_RT2X00_LIB_LEDS=y
# CONFIG_RT2X00_DEBUG is not set
CONFIG_RTL8192CU=m
CONFIG_RTLWIFI=m
CONFIG_RTLWIFI_DEBUG=y
CONFIG_RTL8192C_COMMON=m

I will post more information if necessary.

Best regards,
Guan
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