linux-kernel - [PATCH] usb: gadget: f_uac2: constify snd_pcm

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Message-Id: <6c6f03c62bb26cced9a1d2e1423d6c0587d3105e.1502264028.git.arvind.yadav.cs@gmail.com>
Date:   Wed,  9 Aug 2017 13:16:51 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     balbi@...nel.org, gregkh@...uxfoundation.org
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] usb: gadget: f_uac2: 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>
---
 drivers/usb/gadget/function/u_audio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/function/u_audio.c b/drivers/usb/gadget/function/u_audio.c
index 5dd73b9..d4caa21 100644
--- a/drivers/usb/gadget/function/u_audio.c
+++ b/drivers/usb/gadget/function/u_audio.c
@@ -354,7 +354,7 @@ static int uac_pcm_null(struct snd_pcm_substream *substream)
 	return 0;
 }
 
-static struct snd_pcm_ops uac_pcm_ops = {
+static const struct snd_pcm_ops uac_pcm_ops = {
 	.open = uac_pcm_open,
 	.close = uac_pcm_null,
 	.ioctl = snd_pcm_lib_ioctl,
-- 
1.9.1