ath9k: dynack: check da->enabled first in sampling routines
commit 9d3d65a91f027b8a9af5e63752d9b78cb10eb92d upstream. Check da->enabled flag first in ath_dynack_sample_tx_ts and ath_dynack_sample_ack_ts routines in order to avoid useless processing Tested-by: NKoen Vandeputte <koen.vandeputte@ncentric.com> Signed-off-by: NLorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: NKalle Valo <kvalo@codeaurora.org> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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