D13029.id35037.diff
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D13029.id35037.diff
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	Index: sys/arm/allwinner/if_awg.c
	===================================================================
	--- sys/arm/allwinner/if_awg.c
	+++ sys/arm/allwinner/if_awg.c
	@@ -169,6 +169,7 @@
	bus_dma_tag_t buf_tag;
	struct awg_bufmap buf_map[TX_DESC_COUNT];
	u_int cur, next, queued;
	+ u_int segs;
	};

	struct awg_rxring {
	@@ -399,8 +400,6 @@
	} else {
	status = TX_DESC_CTL;
	size = flags \| len;
	- if ((index & (awg_tx_interval - 1)) == 0)
	- size \|= TX_INT_CTL;
	++sc->tx.queued;
	}

	@@ -449,8 +448,18 @@

	for (cur = index, i = 0; i < nsegs; i++) {
	sc->tx.buf_map[cur].mbuf = (i == 0 ? m : NULL);
	- if (i == nsegs - 1)
	+ if (i == nsegs - 1) {
	flags \|= TX_LAST_DESC;
	+ /*
	+ * Can only request TX completion
	+ * interrupt on last descriptor.
	+ */
	+ sc->tx.segs++;
	+ if (sc->tx.segs >= awg_tx_interval) {
	+ sc->tx.segs = 0;
	+ flags \|= TX_INT_CTL;
	+ }
	+ }
	awg_setup_txdesc(sc, cur, flags, segs[i].ds_addr,
	segs[i].ds_len);
	flags &= ~TX_FIR_DESC;