linux-kernel - [PATCH 11/15] ASoC: dapm: use permission-specific DEVICE

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Message-Id: <1477769829-22230-12-git-send-email-Julia.Lawall@lip6.fr>
Date:   Sat, 29 Oct 2016 21:37:05 +0200
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     Liam Girdwood <lgirdwood@...il.com>
Cc:     kernel-janitors@...r.kernel.org, Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 11/15] ASoC: dapm: use permission-specific DEVICE_ATTR variants

Use DEVICE_ATTR_RO for read only attributes.  This simplifies the
source code, improves readbility, and reduces the chance of
inconsistencies.

The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@ro@
declarer name DEVICE_ATTR;
identifier x,x_show;
@@

DEVICE_ATTR(x, \(0444\|S_IRUGO\), x_show, NULL);

@script:ocaml@
x << ro.x;
x_show << ro.x_show;
@@

if not (x^"_show" = x_show) then Coccilib.include_match false

@@
declarer name DEVICE_ATTR_RO;
identifier ro.x,ro.x_show;
@@

- DEVICE_ATTR(x, \(0444\|S_IRUGO\), x_show, NULL);
+ DEVICE_ATTR_RO(x);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 sound/soc/soc-dapm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/soc-dapm.c b/sound/soc/soc-dapm.c
index 3bbe32e..164b4d3 100644
--- a/sound/soc/soc-dapm.c
+++ b/sound/soc/soc-dapm.c
@@ -2297,7 +2297,7 @@ static ssize_t dapm_widget_show(struct device *dev,
 	return count;
 }
 
-static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
+static DEVICE_ATTR_RO(dapm_widget);
 
 struct attribute *soc_dapm_dev_attrs[] = {
 	&dev_attr_dapm_widget.attr,