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rtl8187: Enable monitor mode to fix multicast reception

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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>
This commit is contained in:
Nils Holland 2017-02-20 00:59:28 +01:00 committed by Kalle Valo
parent dd35cc0896
commit 3beb27028c
1 changed files with 7 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/net/wireless/realtek/rtl818x/rtl8187/dev.c
View File

@ -946,8 +946,7 @@ static int rtl8187_start(struct ieee80211_hw *dev)
(7 << 13 /* RX FIFO threshold NONE */) |
(7 << 10 /* MAX RX DMA */) |
RTL818X_RX_CONF_RX_AUTORESETPHY |
RTL818X_RX_CONF_ONLYERLPKT |
RTL818X_RX_CONF_MULTICAST;
RTL818X_RX_CONF_ONLYERLPKT;
priv->rx_conf = reg;
rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
@ -1319,12 +1318,11 @@ static void rtl8187_configure_filter(struct ieee80211_hw *dev,
priv->rx_conf ^= RTL818X_RX_CONF_FCS;
if (changed_flags & FIF_CONTROL)
priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
if (changed_flags & FIF_OTHER_BSS)
priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
if (*total_flags & FIF_ALLMULTI || multicast > 0)
priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
if (*total_flags & FIF_OTHER_BSS ||
*total_flags & FIF_ALLMULTI || multicast > 0)
priv->rx_conf |= RTL818X_RX_CONF_MONITOR;
else
priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;
priv->rx_conf &= ~RTL818X_RX_CONF_MONITOR;
*total_flags = 0;
@ -1332,10 +1330,10 @@ static void rtl8187_configure_filter(struct ieee80211_hw *dev,
*total_flags |= FIF_FCSFAIL;
if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
*total_flags |= FIF_CONTROL;
if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
if (priv->rx_conf & RTL818X_RX_CONF_MONITOR) {
*total_flags |= FIF_OTHER_BSS;
if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
*total_flags |= FIF_ALLMULTI;
}
rtl818x_iowrite32_async(priv, &priv->map->RX_CONF, priv->rx_conf);
}