linux-kernel - [PATCH 10/15] ASoC: omap-mcbsp: use permission-specific DEVICE

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Message-Id: <1477769829-22230-11-git-send-email-Julia.Lawall@lip6.fr>
Date:   Sat, 29 Oct 2016 21:37:04 +0200
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     Peter Ujfalusi <peter.ujfalusi@...com>
Cc:     kernel-janitors@...r.kernel.org,
        Jarkko Nikula <jarkko.nikula@...mer.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 10/15] ASoC: omap-mcbsp: use permission-specific DEVICE_ATTR variants

Use DEVICE_ATTR_RW for read-write 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>
@rw@
declarer name DEVICE_ATTR;
identifier x,x_show,x_store;
@@

DEVICE_ATTR(x, \(0644\|S_IRUGO|S_IWUSR\), x_show, x_store);

@script:ocaml@
x << rw.x;
x_show << rw.x_show;
x_store << rw.x_store;
@@

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

@@
declarer name DEVICE_ATTR_RW;
identifier rw.x,rw.x_show,rw.x_store;
@@

- DEVICE_ATTR(x, \(0644\|S_IRUGO|S_IWUSR\), x_show, x_store);
+ DEVICE_ATTR_RW(x);
// </smpl>

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

---
 sound/soc/omap/mcbsp.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/omap/mcbsp.c b/sound/soc/omap/mcbsp.c
index 06fec56..0b363d1 100644
--- a/sound/soc/omap/mcbsp.c
+++ b/sound/soc/omap/mcbsp.c
@@ -858,7 +858,7 @@ static ssize_t dma_op_mode_store(struct device *dev,
 	return size;
 }
 
-static DEVICE_ATTR(dma_op_mode, 0644, dma_op_mode_show, dma_op_mode_store);
+static DEVICE_ATTR_RW(dma_op_mode);
 
 static const struct attribute *additional_attrs[] = {
 	&dev_attr_max_tx_thres.attr,
@@ -927,7 +927,7 @@ static ssize_t st_taps_store(struct device *dev,
 	return size;
 }
 
-static DEVICE_ATTR(st_taps, 0644, st_taps_show, st_taps_store);
+static DEVICE_ATTR_RW(st_taps);
 
 static const struct attribute *sidetone_attrs[] = {
 	&dev_attr_st_taps.attr,