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etheriwl: bring back recovery on flushq timeout

--- a/sys/src/9/pc/etheriwl.c

+++ b/sys/src/9/pc/etheriwl.c

@@ -3502,6 +3502,7 @@

 	qunlock(q);

 	if(ctlr->broken)

 		return "flushq: broken";

+	ctlr->broken = 1;

 	return "flushq: timeout";

 }

@@ -4296,6 +4297,7 @@

 	if(ctlr->power)

 		poweroff(ctlr);

 	ctlr->broken = 0;

+	pcidisable(ctlr->pdev);

 }

 static Ctlr *iwlhead, *iwltail;