[PATCH] [2.5] maestro volume tuning

This tunes the volume control of maestro sound boards: The log
conversion seems not good for PCM and CD.  The volume buttons
incrementing / decrementing the main volume by 10 on 100 is too much,
much better set it to 5.

sound/oss/maestro.c

@@ -726,6 +726,12 @@ static void ac97_write_mixer(struct ess_card *card,int mixer, unsigned int left,
 			left = (left * mh->scale) / 100;
 			if ((left == 0) && (right == 0))
 				val |= 0x8000;
+		} else if (mixer == SOUND_MIXER_PCM || mixer == SOUND_MIXER_CD) {
+			/* log conversion seems bad for them */
+			if ((left == 0) && (right == 0))
+				val = 0x8000;
+			right = ((100 - right) * mh->scale) / 100;
+			left = ((100 - left) * mh->scale) / 100;
 		} else {
 			/* log conversion for the stereo controls */
 			if((left == 0) && (right == 0))
@@ -1937,12 +1943,12 @@ ess_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 		   manner by adjusting the master mixer volume. */
 		volume = c->mix.mixer_state[0] & 0xff;
 		if (vol_evt == UP_EVT) {
-			volume += 10;
+			volume += 5;
 			if (volume > 100)
 				volume = 100;
 		}
 		else if (vol_evt == DOWN_EVT) {
-			volume -= 10;
+			volume -= 5;
 			if (volume < 0)
 				volume = 0;
 		} else {