修改4g拨号为QMI,需要在系统里后台执行quectel-CM

hc

2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5

 kernel/sound/usb/line6/midi.c
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@@ -44,7 +44,8 @@
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 	int req, done;
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 	for (;;) {
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-		req = min(line6_midibuf_bytes_free(mb), line6->max_packet_size);
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+		req = min3(line6_midibuf_bytes_free(mb), line6->max_packet_size,
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+			   LINE6_FALLBACK_MAXPACKETSIZE);
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 		done = snd_rawmidi_transmit_peek(substream, chunk, req);
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 		if (done == 0)
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@@ -56,7 +57,8 @@
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 	for (;;) {
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 		done = line6_midibuf_read(mb, chunk,
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-					  LINE6_FALLBACK_MAXPACKETSIZE);
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+					  LINE6_FALLBACK_MAXPACKETSIZE,
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+					  LINE6_MIDIBUF_READ_TX);
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 		if (done == 0)
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 			break;