git: 9front

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audioac97, audiohda: dont block on close, just pad the last block with zeros

--- a/sys/src/9/pc/audioac97.c

+++ b/sys/src/9/pc/audioac97.c

@@ -390,16 +390,15 @@

 {

 	Ctlr *ctlr;

 	Ring *ring;

-	uchar z[1];

 	if(mode == OREAD)

 		return;

-	z[0] = 0;

 	ctlr = adev->ctlr;

 	ring = &ctlr->outring;

 	while(ring->wi % Blocksize)

-		ac97write(adev, z, sizeof(z), 0);

+		if(writering(ring, (uchar*)"", 1) <= 0)

+			break;

 }

 static Pcidev*

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

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

@@ -1296,7 +1296,7 @@

 hdaclose(Audio *adev, int mode)

 {

 	Ctlr *ctlr;

-	uchar z[1];

+	Ring *ring;

 	ctlr = adev->ctlr;

 	if(mode == OREAD || mode == ORDWR){

@@ -1304,11 +1304,10 @@

 			streamstop(ctlr, &ctlr->sin);

 	}

 	if(mode == OWRITE || mode == ORDWR){

-		if(ctlr->sout.active){

-			z[0] = 0;

-			while(ctlr->sout.ring.wi % Blocksize)

-				hdawrite(adev, z, sizeof(z), 0);

-		}

+		ring = &ctlr->sout.ring;

+		while(ring->wi % Blocksize)

+			if(writering(ring, (uchar*)"", 1) <= 0)

+				break;

 	}

 }

-- 

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