mac80211: allow configure_filter callback to sleep
Over time, a whole bunch of drivers have come up with their own scheme to delay the configure_filter operation to a workqueue. To be able to simplify things, allow configure_filter to sleep, and add a new prepare_multicast callback that drivers that need the multicast address list implement. This new callback must be atomic, but most drivers either don't care or just calculate a hash which can be done atomically and then uploaded to the hardware non-atomically. A cursory look suggests that at76c50x-usb, ar9170, mwl8k (which is actually very broken now), rt2x00, wl1251, wl1271 and zd1211 should make use of this new capability. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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John W. Linville

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3ac64beecd
@@ -302,7 +302,7 @@ out:
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static void p54_configure_filter(struct ieee80211_hw *dev,
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unsigned int changed_flags,
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unsigned int *total_flags,
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int mc_count, struct dev_mc_list *mclist)
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u64 multicast)
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{
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struct p54_common *priv = dev->priv;
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