rtlwifi: Synchronize IRQ after disabling it

This make sure any IRQ handlers running on other CPUs complete.
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>

drivers/net/wireless/rtlwifi/rtl8192ce/hw.c

@@ -1194,6 +1194,7 @@ void rtl92ce_disable_interrupt(struct ieee80211_hw *hw)
 	rtl_write_dword(rtlpriv, REG_HIMR, IMR8190_DISABLED);
 	rtl_write_dword(rtlpriv, REG_HIMRE, IMR8190_DISABLED);
 	rtlpci->irq_enabled = false;
+	synchronize_irq(rtlpci->pdev->irq);
 }
 
 static void _rtl92ce_poweroff_adapter(struct ieee80211_hw *hw)