wifi: nl80211: remove redundant err variable
Return value from rdev_set_mcast_rate() directly instead of taking this in another redundant variable. Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Jinpeng Cui <cui.jinpeng2@zte.com.cn> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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