diff --git a/sound/firewire/bebob/bebob_midi.c b/sound/firewire/bebob/bebob_midi.c
index 7e5fb4b990bd..3befa3eca6ef 100644
--- a/sound/firewire/bebob/bebob_midi.c
+++ b/sound/firewire/bebob/bebob_midi.c
@@ -120,12 +120,12 @@ static void set_midi_substream_names(struct snd_bebob *bebob,
 
 int snd_bebob_create_midi_devices(struct snd_bebob *bebob)
 {
-	static struct snd_rawmidi_ops capture_ops = {
+	static const struct snd_rawmidi_ops capture_ops = {
 		.open		= midi_capture_open,
 		.close		= midi_capture_close,
 		.trigger	= midi_capture_trigger,
 	};
-	static struct snd_rawmidi_ops playback_ops = {
+	static const struct snd_rawmidi_ops playback_ops = {
 		.open		= midi_playback_open,
 		.close		= midi_playback_close,
 		.trigger	= midi_playback_trigger,
diff --git a/sound/firewire/dice/dice-midi.c b/sound/firewire/dice/dice-midi.c
index cdf71c211342..8ff6da3c51f7 100644
--- a/sound/firewire/dice/dice-midi.c
+++ b/sound/firewire/dice/dice-midi.c
@@ -91,12 +91,12 @@ static void set_midi_substream_names(struct snd_dice *dice,
 
 int snd_dice_create_midi(struct snd_dice *dice)
 {
-	static struct snd_rawmidi_ops capture_ops = {
+	static const struct snd_rawmidi_ops capture_ops = {
 		.open		= midi_open,
 		.close		= midi_close,
 		.trigger	= midi_capture_trigger,
 	};
-	static struct snd_rawmidi_ops playback_ops = {
+	static const struct snd_rawmidi_ops playback_ops = {
 		.open		= midi_open,
 		.close		= midi_close,
 		.trigger	= midi_playback_trigger,
diff --git a/sound/firewire/digi00x/digi00x-midi.c b/sound/firewire/digi00x/digi00x-midi.c
index 8689c3bb4c6a..915d2a21223e 100644
--- a/sound/firewire/digi00x/digi00x-midi.c
+++ b/sound/firewire/digi00x/digi00x-midi.c
@@ -148,22 +148,22 @@ static void set_midi_substream_names(struct snd_dg00x *dg00x,
 
 int snd_dg00x_create_midi_devices(struct snd_dg00x *dg00x)
 {
-	static struct snd_rawmidi_ops phys_capture_ops = {
+	static const struct snd_rawmidi_ops phys_capture_ops = {
 		.open		= midi_phys_open,
 		.close		= midi_phys_close,
 		.trigger	= midi_phys_capture_trigger,
 	};
-	static struct snd_rawmidi_ops phys_playback_ops = {
+	static const struct snd_rawmidi_ops phys_playback_ops = {
 		.open		= midi_phys_open,
 		.close		= midi_phys_close,
 		.trigger	= midi_phys_playback_trigger,
 	};
-	static struct snd_rawmidi_ops ctl_capture_ops = {
+	static const struct snd_rawmidi_ops ctl_capture_ops = {
 		.open		= midi_ctl_open,
 		.close		= midi_ctl_capture_close,
 		.trigger	= midi_ctl_capture_trigger,
 	};
-	static struct snd_rawmidi_ops ctl_playback_ops = {
+	static const struct snd_rawmidi_ops ctl_playback_ops = {
 		.open		= midi_ctl_open,
 		.close		= midi_ctl_playback_close,
 		.trigger	= midi_ctl_playback_trigger,
diff --git a/sound/firewire/fireworks/fireworks_midi.c b/sound/firewire/fireworks/fireworks_midi.c
index 2873eca22bfc..f5da2cd4ce42 100644
--- a/sound/firewire/fireworks/fireworks_midi.c
+++ b/sound/firewire/fireworks/fireworks_midi.c
@@ -120,12 +120,12 @@ static void set_midi_substream_names(struct snd_efw *efw,
 
 int snd_efw_create_midi_devices(struct snd_efw *efw)
 {
-	static struct snd_rawmidi_ops capture_ops = {
+	static const struct snd_rawmidi_ops capture_ops = {
 		.open		= midi_capture_open,
 		.close		= midi_capture_close,
 		.trigger	= midi_capture_trigger,
 	};
-	static struct snd_rawmidi_ops playback_ops = {
+	static const struct snd_rawmidi_ops playback_ops = {
 		.open		= midi_playback_open,
 		.close		= midi_playback_close,
 		.trigger	= midi_playback_trigger,
diff --git a/sound/firewire/oxfw/oxfw-midi.c b/sound/firewire/oxfw/oxfw-midi.c
index 076a1a977275..b7bbd77dfff1 100644
--- a/sound/firewire/oxfw/oxfw-midi.c
+++ b/sound/firewire/oxfw/oxfw-midi.c
@@ -130,12 +130,12 @@ static void set_midi_substream_names(struct snd_oxfw *oxfw,
 
 int snd_oxfw_create_midi(struct snd_oxfw *oxfw)
 {
-	static struct snd_rawmidi_ops capture_ops = {
+	static const struct snd_rawmidi_ops capture_ops = {
 		.open		= midi_capture_open,
 		.close		= midi_capture_close,
 		.trigger	= midi_capture_trigger,
 	};
-	static struct snd_rawmidi_ops playback_ops = {
+	static const struct snd_rawmidi_ops playback_ops = {
 		.open		= midi_playback_open,
 		.close		= midi_playback_close,
 		.trigger	= midi_playback_trigger,
diff --git a/sound/firewire/oxfw/oxfw-scs1x.c b/sound/firewire/oxfw/oxfw-scs1x.c
index f897c9831077..79400586b7ac 100644
--- a/sound/firewire/oxfw/oxfw-scs1x.c
+++ b/sound/firewire/oxfw/oxfw-scs1x.c
@@ -297,7 +297,7 @@ static void midi_capture_trigger(struct snd_rawmidi_substream *stream, int up)
 	}
 }
 
-static struct snd_rawmidi_ops midi_capture_ops = {
+static const struct snd_rawmidi_ops midi_capture_ops = {
 	.open    = midi_capture_open,
 	.close   = midi_capture_close,
 	.trigger = midi_capture_trigger,
@@ -338,7 +338,7 @@ static void midi_playback_drain(struct snd_rawmidi_substream *stream)
 	wait_event(scs->idle_wait, scs->output_idle);
 }
 
-static struct snd_rawmidi_ops midi_playback_ops = {
+static const struct snd_rawmidi_ops midi_playback_ops = {
 	.open    = midi_playback_open,
 	.close   = midi_playback_close,
 	.trigger = midi_playback_trigger,
diff --git a/sound/firewire/tascam/tascam-midi.c b/sound/firewire/tascam/tascam-midi.c
index 7fdc71e4763e..df4f95d65925 100644
--- a/sound/firewire/tascam/tascam-midi.c
+++ b/sound/firewire/tascam/tascam-midi.c
@@ -70,12 +70,12 @@ static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
 
 int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
 {
-	static struct snd_rawmidi_ops capture_ops = {
+	static const struct snd_rawmidi_ops capture_ops = {
 		.open		= midi_capture_open,
 		.close		= midi_capture_close,
 		.trigger	= midi_capture_trigger,
 	};
-	static struct snd_rawmidi_ops playback_ops = {
+	static const struct snd_rawmidi_ops playback_ops = {
 		.open		= midi_playback_open,
 		.close		= midi_playback_close,
 		.trigger	= midi_playback_trigger,