From a4400dfdbd789398455cf1c84ee1d7e20f649357 Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Date: Thu, 20 Jul 2017 09:17:58 -0500
Subject: [PATCH] staging: bcm2835-audio: constify snd_pcm_ops structures
Git-commit: a4400dfdbd789398455cf1c84ee1d7e20f649357
Patch-mainline: v4.14-rc1
References: FATE#324827

Check for snd_pcm_ops structures that are only stored in the ops field of
a snd_soc_platform_driver structure or passed as the third argument to
snd_pcm_set_ops. The corresponding field or parameter is declared const,
so snd_pcm_ops structures that have this property can be declared as
const also.

This issue was detected using Coccinelle and the following semantic patch:

@r disable optional_qualifier@
identifier i;
position p;
@@
static struct snd_pcm_ops i@p = { ... };

@ok1@
identifier r.i;
struct snd_soc_platform_driver e;
position p;
@@
e.ops = &i@p;

@ok2@
identifier r.i;
expression e1, e2; position p;
@@
snd_pcm_set_ops(e1, e2, &i@p)

@bad@
position p != {r.p,ok1.p,ok2.p};
identifier r.i;
struct snd_pcm_ops e;
@@
e@i@p

@depends on !bad disable optional_qualifier@
identifier r.i;
@@
static
+const
struct snd_pcm_ops i = { ... };

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
+++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c
@@ -438,7 +438,7 @@ static int snd_bcm2835_pcm_lib_ioctl(str
 }
 
 /* operators */
-static struct snd_pcm_ops snd_bcm2835_playback_ops = {
+static const struct snd_pcm_ops snd_bcm2835_playback_ops = {
 	.open = snd_bcm2835_playback_open,
 	.close = snd_bcm2835_playback_close,
 	.ioctl = snd_bcm2835_pcm_lib_ioctl,
@@ -450,7 +450,7 @@ static struct snd_pcm_ops snd_bcm2835_pl
 	.ack = snd_bcm2835_pcm_ack,
 };
 
-static struct snd_pcm_ops snd_bcm2835_playback_spdif_ops = {
+static const struct snd_pcm_ops snd_bcm2835_playback_spdif_ops = {
 	.open = snd_bcm2835_playback_spdif_open,
 	.close = snd_bcm2835_playback_close,
 	.ioctl = snd_bcm2835_pcm_lib_ioctl,