ath9k: fix module reload on ar713x based systems with ar92xx

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@24163 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/mac80211/patches/570-ath9k_fix_module_reload.patch

@@ -0,0 +1,13 @@
+--- a/drivers/net/wireless/ath/ath9k/pci.c
++++ b/drivers/net/wireless/ath/ath9k/pci.c
+@@ -255,6 +255,10 @@ static void ath_pci_remove(struct pci_de
+ 	struct ath_wiphy *aphy = hw->priv;
+ 	struct ath_softc *sc = aphy->sc;
+ 	void __iomem *mem = sc->mem;
++	u16 val;
++
++	/* Do a config read to clear pre-existing pci error status */
++	pci_read_config_word(pdev, PCI_COMMAND, &val);
+ 
+ 	ath9k_deinit_device(sc);
+ 	free_irq(sc->irq, sc);