D8685.id22631.diff
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D8685.id22631.diff
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	Index: sys/sys/buf_ring.h
	===================================================================
	--- sys/sys/buf_ring.h
	+++ sys/sys/buf_ring.h
	@@ -67,11 +67,13 @@
	uint32_t prod_head, prod_next, cons_tail;
	#ifdef DEBUG_BUFRING
	int i;
	- for (i = br->br_cons_head; i != br->br_prod_head;
	- i = ((i + 1) & br->br_cons_mask))
	- if(br->br_ring[i] == buf)
	- panic("buf=%p already enqueue at %d prod=%d cons=%d",
	- buf, i, br->br_prod_tail, br->br_cons_tail);
	+ if (br->br_cons_head != br->br_prod_head) {
	+ for (i = br->br_cons_head + 1; i != br->br_prod_head;
	+ i = ((i + 1) & br->br_cons_mask))
	+ if(br->br_ring[i] == buf)
	+ panic("buf=%p already enqueue at %d prod=%d cons=%d",
	+ buf, i, br->br_prod_tail, br->br_cons_tail);
	+ }
	#endif
	critical_enter();
	do {