linux-kernel - [PATCH 05/13] ALSA: firewire: constify snd_pcm

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Date:   Fri, 18 Aug 2017 13:15:13 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     perex@...ex.cz, tiwai@...e.com, johannes@...solutions.net,
        linux@...linux.org.uk, daniel@...que.org, clemens@...isch.de
Cc:     linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: [PATCH 05/13] ALSA: firewire: constify snd_pcm_ops structures

snd_pcm_ops are not supposed to change at runtime. All functions
working with snd_pcm_ops provided by <sound/pcm.h> work with
const snd_pcm_ops. So mark the non-const structs as const.

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 sound/firewire/isight.c        | 2 +-
 sound/firewire/motu/motu-pcm.c | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/firewire/isight.c b/sound/firewire/isight.c
index 48d6dca..5826aa8 100644
--- a/sound/firewire/isight.c
+++ b/sound/firewire/isight.c
@@ -444,7 +444,7 @@ static snd_pcm_uframes_t isight_pointer(struct snd_pcm_substream *substream)
 
 static int isight_create_pcm(struct isight *isight)
 {
-	static struct snd_pcm_ops ops = {
+	static const struct snd_pcm_ops ops = {
 		.open      = isight_open,
 		.close     = isight_close,
 		.ioctl     = snd_pcm_lib_ioctl,
diff --git a/sound/firewire/motu/motu-pcm.c b/sound/firewire/motu/motu-pcm.c
index a2b50df..1466e46 100644
--- a/sound/firewire/motu/motu-pcm.c
+++ b/sound/firewire/motu/motu-pcm.c
@@ -352,7 +352,7 @@ static int playback_ack(struct snd_pcm_substream *substream)
 
 int snd_motu_create_pcm_devices(struct snd_motu *motu)
 {
-	static struct snd_pcm_ops capture_ops = {
+	static const struct snd_pcm_ops capture_ops = {
 		.open      = pcm_open,
 		.close     = pcm_close,
 		.ioctl     = snd_pcm_lib_ioctl,
@@ -365,7 +365,7 @@ int snd_motu_create_pcm_devices(struct snd_motu *motu)
 		.page      = snd_pcm_lib_get_vmalloc_page,
 		.mmap      = snd_pcm_lib_mmap_vmalloc,
 	};
-	static struct snd_pcm_ops playback_ops = {
+	static const struct snd_pcm_ops playback_ops = {
 		.open      = pcm_open,
 		.close     = pcm_close,
 		.ioctl     = snd_pcm_lib_ioctl,
-- 
1.9.1