Messages in this thread Patch in this message | | | Date | Mon, 21 Mar 2011 16:01:37 -0700 | From | Greg KH <> | Subject | [21/78] ath9k: remove support for the FIF_PROMISC_IN_BSS filter flag |
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2.6.38-stable review patch. If anyone has any objections, please let us know.
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From: Felix Fietkau <nbd@openwrt.org>
commit 2e286947f1294239527c11f9f466ddce6466455b upstream.
The hardware rx filter flag triggered by FIF_PROMISC_IN_BSS is overly broad and covers even frames with PHY errors. When this flag is enabled, this message shows up frequently during scanning or hardware resets:
ath: Could not stop RX, we could be confusing the DMA engine when we start RX up
Since promiscuous mode is usually not particularly useful, yet enabled by default by bridging (either used normally in 4-addr mode, or with hacks for various virtualization software), we should sacrifice it for better reliability during normal operation.
This patch leaves it enabled if there are active monitor mode interfaces, since it's very useful for debugging.
Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- drivers/net/wireless/ath/ath9k/recv.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -439,9 +439,7 @@ u32 ath_calcrxfilter(struct ath_softc *s * mode interface or when in monitor mode. AP mode does not need this * since it receives all in-BSS frames anyway. */ - if (((sc->sc_ah->opmode != NL80211_IFTYPE_AP) && - (sc->rx.rxfilter & FIF_PROMISC_IN_BSS)) || - (sc->sc_ah->is_monitoring)) + if (sc->sc_ah->is_monitoring) rfilt |= ATH9K_RX_FILTER_PROM; if (sc->rx.rxfilter & FIF_CONTROL)
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