rtlwifi: Use write barrier when assigning ownership
Make sure all updates to a descriptor are flushed to memory before assigning ownship to hardware. Signed-off-by: NMike McCormack <mikem@ring3k.org> Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net> Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>
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