ALSA: oxfw: use ENXIO for not-supported cases

When AV/C command returns 'NOT IMPLEMENTED' status in its response, ALSA
oxfw driver uses ENOSYS as error code. However, it's expected just to be
used for missing system call number.

This commit replaces it with ENXIO.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20200113073418.24622-2-o-takashi@sakamocchi.jpSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/oxfw/oxfw-command.c

@@ -38,7 +38,7 @@ int avc_stream_set_format(struct fw_unit *unit, enum avc_general_plug_dir dir,
 	else if (err < len + 10)
 		err = -EIO;
 	else if (buf[0] == 0x08) /* NOT IMPLEMENTED */
-		err = -ENOSYS;
+		err = -ENXIO;
 	else if (buf[0] == 0x0a) /* REJECTED */
 		err = -EINVAL;
 	else
@@ -83,7 +83,7 @@ int avc_stream_get_format(struct fw_unit *unit,
 	else if (err < 12)
 		err = -EIO;
 	else if (buf[0] == 0x08)	/* NOT IMPLEMENTED */
-		err = -ENOSYS;
+		err = -ENXIO;
 	else if (buf[0] == 0x0a)	/* REJECTED */
 		err = -EINVAL;
 	else if (buf[0] == 0x0b)	/* IN TRANSITION */
@@ -147,7 +147,7 @@ int avc_general_inquiry_sig_fmt(struct fw_unit *unit, unsigned int rate,
 	else if (err < 8)
 		err = -EIO;
 	else if (buf[0] == 0x08)	/* NOT IMPLEMENTED */
-		err = -ENOSYS;
+		err = -ENXIO;
 	if (err < 0)
 		goto end;
 

sound/firewire/oxfw/oxfw-stream.c

@@ -513,7 +513,7 @@ int snd_oxfw_stream_parse_format(u8 *format,
 	 *  Level 1:	AM824 Compound  (0x40)
 	 */
 	if ((format[0] != 0x90) || (format[1] != 0x40))
-		return -ENOSYS;
+		return -ENXIO;
 
 	/* check the sampling rate */
 	for (i = 0; i < ARRAY_SIZE(avc_stream_rate_table); i++) {
@@ -521,7 +521,7 @@ int snd_oxfw_stream_parse_format(u8 *format,
 			break;
 	}
 	if (i == ARRAY_SIZE(avc_stream_rate_table))
-		return -ENOSYS;
+		return -ENXIO;
 
 	formation->rate = oxfw_rate_table[i];
 
@@ -565,13 +565,13 @@ int snd_oxfw_stream_parse_format(u8 *format,
 		/* Don't care */
 		case 0xff:
 		default:
-			return -ENOSYS;	/* not supported */
+			return -ENXIO;	/* not supported */
 		}
 	}
 
 	if (formation->pcm  > AM824_MAX_CHANNELS_FOR_PCM ||
 	    formation->midi > AM824_MAX_CHANNELS_FOR_MIDI)
-		return -ENOSYS;
+		return -ENXIO;
 
 	return 0;
 }
@@ -656,7 +656,7 @@ static int fill_stream_formats(struct snd_oxfw *oxfw,
 	/* get first entry */
 	len = AVC_GENERIC_FRAME_MAXIMUM_BYTES;
 	err = avc_stream_get_format_list(oxfw->unit, dir, 0, buf, &len, 0);
-	if (err == -ENOSYS) {
+	if (err == -ENXIO) {
 		/* LIST subfunction is not implemented */
 		len = AVC_GENERIC_FRAME_MAXIMUM_BYTES;
 		err = assume_stream_formats(oxfw, dir, pid, buf, &len,
@@ -728,7 +728,7 @@ int snd_oxfw_stream_discover(struct snd_oxfw *oxfw)
 			err);
 		goto end;
 	} else if ((plugs[0] == 0) && (plugs[1] == 0)) {
-		err = -ENOSYS;
+		err = -ENXIO;
 		goto end;
 	}