From d8701fae95c0e6cb587b293cb8e01acc96dd1095 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 31 Jul 2019 15:17:14 +0200
Subject: [PATCH] ASoC: Intel: SoC: skylake: no need to check return value of debugfs_create functions
Git-commit: d8701fae95c0e6cb587b293cb8e01acc96dd1095
Patch-mainline: v5.4-rc1
References: jsc#SLE-16518

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.

Also, if a debugfs call fails, userspace is notified with an error in
the log, so no need to log the error again.

Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Cc: Jie Yang <yang.jie@linux.intel.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: alsa-devel@alsa-project.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20190731131716.9764-1-gregkh@linuxfoundation.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/intel/skylake/skl-debug.c | 28 +++++-----------------------
 1 file changed, 5 insertions(+), 23 deletions(-)

diff --git a/sound/soc/intel/skylake/skl-debug.c b/sound/soc/intel/skylake/skl-debug.c
index fb232428109f..212370bf704c 100644
--- a/sound/soc/intel/skylake/skl-debug.c
+++ b/sound/soc/intel/skylake/skl-debug.c
@@ -164,10 +164,8 @@ void skl_debug_init_module(struct skl_debug *d,
 			struct snd_soc_dapm_widget *w,
 			struct skl_module_cfg *mconfig)
 {
-	if (!debugfs_create_file(w->name, 0444,
-				d->modules, mconfig,
-				&mcfg_fops))
-		dev_err(d->dev, "%s: module debugfs init failed\n", w->name);
+	debugfs_create_file(w->name, 0444, d->modules, mconfig,
+			    &mcfg_fops);
 }
 
 static ssize_t fw_softreg_read(struct file *file, char __user *user_buf,
@@ -224,34 +222,18 @@ struct skl_debug *skl_debugfs_init(struct skl_dev *skl)
 		return NULL;
 
 	/* create the debugfs dir with platform component's debugfs as parent */
-	d->fs = debugfs_create_dir("dsp",
-				   skl->component->debugfs_root);
-	if (IS_ERR(d->fs) || !d->fs) {
-		dev_err(&skl->pci->dev, "debugfs root creation failed\n");
-		return NULL;
-	}
+	d->fs = debugfs_create_dir("dsp", skl->component->debugfs_root);
 
 	d->skl = skl;
 	d->dev = &skl->pci->dev;
 
 	/* now create the module dir */
 	d->modules = debugfs_create_dir("modules", d->fs);
-	if (IS_ERR(d->modules) || !d->modules) {
-		dev_err(&skl->pci->dev, "modules debugfs create failed\n");
-		goto err;
-	}
 
-	if (!debugfs_create_file("fw_soft_regs_rd", 0444, d->fs, d,
-				 &soft_regs_ctrl_fops)) {
-		dev_err(d->dev, "fw soft regs control debugfs init failed\n");
-		goto err;
-	}
+	debugfs_create_file("fw_soft_regs_rd", 0444, d->fs, d,
+			    &soft_regs_ctrl_fops);
 
 	return d;
-
-err:
-	debugfs_remove_recursive(d->fs);
-	return NULL;
 }
 
 void skl_debugfs_exit(struct skl_dev *skl)
-- 
2.16.4