[alsa-devel] Applied "ASoC: fsl: no need to check return value of debugfs_create functions" to the asoc tree

[Mark Brown]

The patch

   ASoC: fsl: no need to check return value of debugfs_create functions

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-5.3

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 227ab8baa15bdd7a48acfb7b61c52a7a5eb87e72 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Date: Fri, 14 Jun 2019 11:47:55 +0200
Subject: [PATCH] ASoC: fsl: no need to check return value of debugfs_create
 functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/fsl/fsl_ssi.c     |  4 +---
 sound/soc/fsl/fsl_ssi.h     |  8 +++-----
 sound/soc/fsl/fsl_ssi_dbg.c | 18 ++++--------------
 sound/soc/fsl/imx-audmux.c  | 10 ++--------
 4 files changed, 10 insertions(+), 30 deletions(-)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 09b2967befd9..fa862af25c1a 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -1582,9 +1582,7 @@ static int fsl_ssi_probe(struct platform_device *pdev)
 		}
 	}
 
-	ret = fsl_ssi_debugfs_create(&ssi->dbg_stats, dev);
-	if (ret)
-		goto error_asoc_register;
+	fsl_ssi_debugfs_create(&ssi->dbg_stats, dev);
 
 	/* Initially configures SSI registers */
 	fsl_ssi_hw_init(ssi);
diff --git a/sound/soc/fsl/fsl_ssi.h b/sound/soc/fsl/fsl_ssi.h
index 0bdda608d414..db57cad80449 100644
--- a/sound/soc/fsl/fsl_ssi.h
+++ b/sound/soc/fsl/fsl_ssi.h
@@ -270,7 +270,6 @@ struct device;
 
 struct fsl_ssi_dbg {
 	struct dentry *dbg_dir;
-	struct dentry *dbg_stats;
 
 	struct {
 		unsigned int rfrc;
@@ -299,7 +298,7 @@ struct fsl_ssi_dbg {
 
 void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *ssi_dbg, u32 sisr);
 
-int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev);
+void fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev);
 
 void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg);
 
@@ -312,10 +311,9 @@ static inline void fsl_ssi_dbg_isr(struct fsl_ssi_dbg *stats, u32 sisr)
 {
 }
 
-static inline int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg,
-					 struct device *dev)
+static inline void fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg,
+					  struct device *dev)
 {
-	return 0;
 }
 
 static inline void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)
diff --git a/sound/soc/fsl/fsl_ssi_dbg.c b/sound/soc/fsl/fsl_ssi_dbg.c
index 6f6294149476..2a20ee23dc52 100644
--- a/sound/soc/fsl/fsl_ssi_dbg.c
+++ b/sound/soc/fsl/fsl_ssi_dbg.c
@@ -126,25 +126,15 @@ static int fsl_ssi_stats_show(struct seq_file *s, void *unused)
 
 DEFINE_SHOW_ATTRIBUTE(fsl_ssi_stats);
 
-int fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev)
+void fsl_ssi_debugfs_create(struct fsl_ssi_dbg *ssi_dbg, struct device *dev)
 {
 	ssi_dbg->dbg_dir = debugfs_create_dir(dev_name(dev), NULL);
-	if (!ssi_dbg->dbg_dir)
-		return -ENOMEM;
 
-	ssi_dbg->dbg_stats = debugfs_create_file("stats", 0444,
-						 ssi_dbg->dbg_dir, ssi_dbg,
-						 &fsl_ssi_stats_fops);
-	if (!ssi_dbg->dbg_stats) {
-		debugfs_remove(ssi_dbg->dbg_dir);
-		return -ENOMEM;
-	}
-
-	return 0;
+	debugfs_create_file("stats", 0444, ssi_dbg->dbg_dir, ssi_dbg,
+			    &fsl_ssi_stats_fops);
 }
 
 void fsl_ssi_debugfs_remove(struct fsl_ssi_dbg *ssi_dbg)
 {
-	debugfs_remove(ssi_dbg->dbg_stats);
-	debugfs_remove(ssi_dbg->dbg_dir);
+	debugfs_remove_recursive(ssi_dbg->dbg_dir);
 }
diff --git a/sound/soc/fsl/imx-audmux.c b/sound/soc/fsl/imx-audmux.c
index 04e59e66711d..b2351cd33b0f 100644
--- a/sound/soc/fsl/imx-audmux.c
+++ b/sound/soc/fsl/imx-audmux.c
@@ -141,17 +141,11 @@ static void audmux_debugfs_init(void)
 	char buf[20];
 
 	audmux_debugfs_root = debugfs_create_dir("audmux", NULL);
-	if (!audmux_debugfs_root) {
-		pr_warning("Failed to create AUDMUX debugfs root\n");
-		return;
-	}
 
 	for (i = 0; i < MX31_AUDMUX_PORT7_SSI_PINS_7 + 1; i++) {
 		snprintf(buf, sizeof(buf), "ssi%lu", i);
-		if (!debugfs_create_file(buf, 0444, audmux_debugfs_root,
-					 (void *)i, &audmux_debugfs_fops))
-			pr_warning("Failed to create AUDMUX port %lu debugfs file\n",
-				   i);
+		debugfs_create_file(buf, 0444, audmux_debugfs_root,
+				    (void *)i, &audmux_debugfs_fops);
 	}
 }
 
-- 
2.20.1