rtl8187: Enable monitor mode to fix multicast reception
authorNils Holland <nholland@tisys.org>
Sun, 19 Feb 2017 23:59:28 +0000 (00:59 +0100)
committerKalle Valo <kvalo@codeaurora.org>
Wed, 8 Mar 2017 15:07:10 +0000 (17:07 +0200)
commit3beb27028c446dce74a1690ea3ef2dfae7503e74
treeb840008369402b221ef0fb761ff1cffedb95083d
parentdd35cc0896faff5ed9d22eac9ea4a1920e2eec0c
rtl8187: Enable monitor mode to fix multicast reception

The rtl8187 cards don't seem to receive multicast frames, which,
among other things, makes them fail to receive RAs in IPv6 networks.
The cause seems to be that the RTL818X_RX_CONF_MULTICAST flag doesn't
have the desired effect.

Fix the issue by setting RTL818X_RX_CONF_MONITOR instead, which puts the
card into monitor mode and resolves the problem so that multicast frames
are sucessfully passed to the kernel.

The existence of the problem and the effectiveness of the solution has
originally been confirmed on an 8187B based card with the USB id of
0bda:8197. Subsequent testing by Larry Finger on an 8187L based card,
which follows the second (8187, i.e. "non-b") code path in the driver,
has confirmed that the fix does not cause any noticeable regresssions
there either.

Signed-off-by: Nils Holland <nholland@tisys.org>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c