X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=sound%2Fisa%2Fsb%2Fsb8_midi.c;h=988a8b73475f26f65e1f7f8bbb344cfff16532ba;hb=3813d4024a75562baf77d3907fb6afbf8f9c8232;hp=c549aceea2944ae6a3236301495d443f8dfa5309;hpb=db9edfd7e339ca4113153d887e782dd05be5a9eb;p=firefly-linux-kernel-4.4.55.git

diff --git a/sound/isa/sb/sb8_midi.c b/sound/isa/sb/sb8_midi.c
index c549aceea294..988a8b73475f 100644
--- a/sound/isa/sb/sb8_midi.c
+++ b/sound/isa/sb/sb8_midi.c
@@ -1,5 +1,5 @@
 /*
- *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  *  Routines for control of SoundBlaster cards - MIDI interface
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -26,26 +26,27 @@
  *   Added full duplex UART mode for DSP version 2.0 and later.
  */
 
-#include <sound/driver.h>
 #include <asm/io.h>
 #include <linux/time.h>
 #include <sound/core.h>
 #include <sound/sb.h>
 
-/*
-
- */
 
-irqreturn_t snd_sb8dsp_midi_interrupt(struct snd_sb * chip)
+irqreturn_t snd_sb8dsp_midi_interrupt(struct snd_sb *chip)
 {
 	struct snd_rawmidi *rmidi;
 	int max = 64;
 	char byte;
 
-	if (chip == NULL || (rmidi = chip->rmidi) == NULL) {
+	if (!chip)
+		return IRQ_NONE;
+	
+	rmidi = chip->rmidi;
+	if (!rmidi) {
 		inb(SBP(chip, DATA_AVAIL));	/* ack interrupt */
 		return IRQ_NONE;
 	}
+
 	spin_lock(&chip->midi_input_lock);
 	while (max-- > 0) {
 		if (inb(SBP(chip, DATA_AVAIL)) & 0x80) {
@@ -59,10 +60,6 @@ irqreturn_t snd_sb8dsp_midi_interrupt(struct snd_sb * chip)
 	return IRQ_HANDLED;
 }
 
-/*
-
- */
-
 static int snd_sb8dsp_midi_input_open(struct snd_rawmidi_substream *substream)
 {
 	unsigned long flags;
@@ -252,10 +249,6 @@ static void snd_sb8dsp_midi_output_trigger(struct snd_rawmidi_substream *substre
 		snd_sb8dsp_midi_output_write(substream);
 }
 
-/*
-
- */
-
 static struct snd_rawmidi_ops snd_sb8dsp_midi_output =
 {
 	.open =		snd_sb8dsp_midi_output_open,