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2024-10-09 244b2c5ca8b14627e4a17755e5922221e121c771 
 kernel/sound/drivers/mts64.c
....@@ -1,21 +1,7 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*     
23  *   ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
34  *   Copyright (c) 2006 by Matthias König <mk@phasorlab.de>
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- *
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- *   This program is free software; you can redistribute it and/or modify 
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- *   it under the terms of the GNU General Public License as published by 
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- *   the Free Software Foundation; either version 2 of the License, or 
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- *   (at your option) any later version. 
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- *
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- *   This program is distributed in the hope that it will be useful, 
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- *   but WITHOUT ANY WARRANTY; without even the implied warranty of 
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- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- *   GNU General Public License for more details.
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- *
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- *   You should have received a copy of the GNU General Public License
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- *   along with this program; if not, write to the Free Software
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- *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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- *
195  */
206 
217 #include <linux/init.h>
....@@ -275,7 +261,7 @@
275261  */
276262 static u8 mts64_map_midi_input(u8 c)
277263 {
278
-	static u8 map[] = { 0, 1, 4, 2, 3 };
264
+	static const u8 map[] = { 0, 1, 4, 2, 3 };
279265 
280266 	return map[c];
281267 }
....@@ -367,7 +353,7 @@
367353 			      u8 seconds, u8 frames,
368354 			      u8 idx)
369355 {
370
-	static u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24, 
356
+	static const u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24,
371357 			     MTS64_CMD_SMPTE_FPS_25,
372358 			     MTS64_CMD_SMPTE_FPS_2997, 
373359 			     MTS64_CMD_SMPTE_FPS_30D,
....@@ -481,7 +467,7 @@
481467 	return changed;
482468 }
483469 
484
-static struct snd_kcontrol_new mts64_ctl_smpte_switch = {
470
+static const struct snd_kcontrol_new mts64_ctl_smpte_switch = {
485471 	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
486472 	.name  = "SMPTE Playback Switch",
487473 	.index = 0,
....@@ -554,7 +540,7 @@
554540 	return changed;
555541 }
556542 
557
-static struct snd_kcontrol_new mts64_ctl_smpte_time_hours = {
543
+static const struct snd_kcontrol_new mts64_ctl_smpte_time_hours = {
558544 	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
559545 	.name  = "SMPTE Time Hours",
560546 	.index = 0,
....@@ -565,7 +551,7 @@
565551 	.put  = snd_mts64_ctl_smpte_time_put
566552 };
567553 
568
-static struct snd_kcontrol_new mts64_ctl_smpte_time_minutes = {
554
+static const struct snd_kcontrol_new mts64_ctl_smpte_time_minutes = {
569555 	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
570556 	.name  = "SMPTE Time Minutes",
571557 	.index = 0,
....@@ -576,7 +562,7 @@
576562 	.put  = snd_mts64_ctl_smpte_time_put
577563 };
578564 
579
-static struct snd_kcontrol_new mts64_ctl_smpte_time_seconds = {
565
+static const struct snd_kcontrol_new mts64_ctl_smpte_time_seconds = {
580566 	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
581567 	.name  = "SMPTE Time Seconds",
582568 	.index = 0,
....@@ -587,7 +573,7 @@
587573 	.put  = snd_mts64_ctl_smpte_time_put
588574 };
589575 
590
-static struct snd_kcontrol_new mts64_ctl_smpte_time_frames = {
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+static const struct snd_kcontrol_new mts64_ctl_smpte_time_frames = {
591577 	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
592578 	.name  = "SMPTE Time Frames",
593579 	.index = 0,
....@@ -639,7 +625,7 @@
639625 	return changed;
640626 }
641627 
642
-static struct snd_kcontrol_new mts64_ctl_smpte_fps = {
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+static const struct snd_kcontrol_new mts64_ctl_smpte_fps = {
643629 	.iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
644630 	.name  = "SMPTE Fps",
645631 	.index = 0,
....@@ -655,7 +641,7 @@
655641 				struct mts64 *mts)
656642 {
657643 	int err, i;
658
-	static struct snd_kcontrol_new *control[] = {
644
+	static const struct snd_kcontrol_new *control[] = {
659645 		&mts64_ctl_smpte_switch,
660646 		&mts64_ctl_smpte_time_hours,
661647 		&mts64_ctl_smpte_time_minutes,
....@@ -830,6 +816,9 @@
830816 	u8 status, data;
831817 	struct snd_rawmidi_substream *substream;
832818 
819
+	if (!mts)
820
+		return;
821
+
833822 	spin_lock(&mts->lock);
834823 	ret = mts64_read(mts->pardev->port);
835824 	data = ret & 0x00ff;