1 files changed, 25 insertions, 10 deletions

diff --git a/sound/pci/emu10k1/emu10k1x.c b/sound/pci/emu10k1/emu10k1x.c
index 2167279429b8..d0aa1e1031d6 100644
--- a/sound/pci/emu10k1/emu10k1x.c
+++ b/sound/pci/emu10k1/emu10k1x.c
@@ -1286,7 +1286,7 @@ static void snd_emu10k1x_midi_interrupt(struct emu10k1x *emu, unsigned int statu
         do_emu10k1x_midi_interrupt(emu, &emu->midi, status);
 }
 
-static void snd_emu10k1x_midi_cmd(struct emu10k1x * emu,
+static int snd_emu10k1x_midi_cmd(struct emu10k1x * emu,
                                   struct emu10k1x_midi *midi, unsigned char cmd, int ack)
 {
         unsigned long flags;
@@ -1312,11 +1312,14 @@ static void snd_emu10k1x_midi_cmd(struct emu10k1x * emu,
                 ok = 1;
         }
         spin_unlock_irqrestore(&midi->input_lock, flags);
-        if (!ok)
+        if (!ok) {
                 snd_printk(KERN_ERR "midi_cmd: 0x%x failed at 0x%lx (status = 0x%x, data = 0x%x)!!!\n",
                            cmd, emu->port,
                            mpu401_read_stat(emu, midi),
                            mpu401_read_data(emu, midi));
+                return 1;
+        }
+        return 0;
 }
 
 static int snd_emu10k1x_midi_input_open(struct snd_rawmidi_substream *substream)
@@ -1332,12 +1335,17 @@ static int snd_emu10k1x_midi_input_open(struct snd_rawmidi_substream *substream)
         midi->substream_input = substream;
         if (!(midi->midi_mode & EMU10K1X_MIDI_MODE_OUTPUT)) {
                 spin_unlock_irqrestore(&midi->open_lock, flags);
-                snd_emu10k1x_midi_cmd(emu, midi, MPU401_RESET, 1);
-                snd_emu10k1x_midi_cmd(emu, midi, MPU401_ENTER_UART, 1);
+                if (snd_emu10k1x_midi_cmd(emu, midi, MPU401_RESET, 1))
+                        goto error_out;
+                if (snd_emu10k1x_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
+                        goto error_out;
         } else {
                 spin_unlock_irqrestore(&midi->open_lock, flags);
         }
         return 0;
+
+error_out:
+        return -EIO;
 }
 
 static int snd_emu10k1x_midi_output_open(struct snd_rawmidi_substream *substream)
@@ -1353,12 +1361,17 @@ static int snd_emu10k1x_midi_output_open(struct snd_rawmidi_substream *substream
         midi->substream_output = substream;
         if (!(midi->midi_mode & EMU10K1X_MIDI_MODE_INPUT)) {
                 spin_unlock_irqrestore(&midi->open_lock, flags);
-                snd_emu10k1x_midi_cmd(emu, midi, MPU401_RESET, 1);
-                snd_emu10k1x_midi_cmd(emu, midi, MPU401_ENTER_UART, 1);
+                if (snd_emu10k1x_midi_cmd(emu, midi, MPU401_RESET, 1))
+                        goto error_out;
+                if (snd_emu10k1x_midi_cmd(emu, midi, MPU401_ENTER_UART, 1))
+                        goto error_out;
         } else {
                 spin_unlock_irqrestore(&midi->open_lock, flags);
         }
         return 0;
+
+error_out:
+        return -EIO;
 }
 
 static int snd_emu10k1x_midi_input_close(struct snd_rawmidi_substream *substream)
@@ -1366,6 +1379,7 @@ static int snd_emu10k1x_midi_input_close(struct snd_rawmidi_substream *substream
         struct emu10k1x *emu;
         struct emu10k1x_midi *midi = substream->rmidi->private_data;
         unsigned long flags;
+        int err = 0;
 
         emu = midi->emu;
         snd_assert(emu, return -ENXIO);
@@ -1375,11 +1389,11 @@ static int snd_emu10k1x_midi_input_close(struct snd_rawmidi_substream *substream
         midi->substream_input = NULL;
         if (!(midi->midi_mode & EMU10K1X_MIDI_MODE_OUTPUT)) {
                 spin_unlock_irqrestore(&midi->open_lock, flags);
-                snd_emu10k1x_midi_cmd(emu, midi, MPU401_RESET, 0);
+                err = snd_emu10k1x_midi_cmd(emu, midi, MPU401_RESET, 0);
         } else {
                 spin_unlock_irqrestore(&midi->open_lock, flags);
         }
-        return 0;
+        return err;
 }
 
 static int snd_emu10k1x_midi_output_close(struct snd_rawmidi_substream *substream)
@@ -1387,6 +1401,7 @@ static int snd_emu10k1x_midi_output_close(struct snd_rawmidi_substream *substrea
         struct emu10k1x *emu;
         struct emu10k1x_midi *midi = substream->rmidi->private_data;
         unsigned long flags;
+        int err = 0;
 
         emu = midi->emu;
         snd_assert(emu, return -ENXIO);
@@ -1396,11 +1411,11 @@ static int snd_emu10k1x_midi_output_close(struct snd_rawmidi_substream *substrea
         midi->substream_output = NULL;
         if (!(midi->midi_mode & EMU10K1X_MIDI_MODE_INPUT)) {
                 spin_unlock_irqrestore(&midi->open_lock, flags);
-                snd_emu10k1x_midi_cmd(emu, midi, MPU401_RESET, 0);
+                err = snd_emu10k1x_midi_cmd(emu, midi, MPU401_RESET, 0);
         } else {
                 spin_unlock_irqrestore(&midi->open_lock, flags);
         }
-        return 0;
+        return err;
 }
 
 static void snd_emu10k1x_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)