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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Mark Brown <broonie@kernel.org>
Subject: [PATCH 57/69] ASoC: cs43130: handle errors in cs43130_probe() properly
Date:   Mon,  3 May 2021 13:57:24 +0200
Message-Id: <20210503115736.2104747-58-gregkh@linuxfoundation.org>
In-Reply-To: <20210503115736.2104747-1-gregkh@linuxfoundation.org>
References: <20210503115736.2104747-1-gregkh@linuxfoundation.org>
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cs43130_probe() does not do any valid error checking of things it
initializes, OR what it does, it does not unwind properly if there are
errors.

Fix this up by moving the sysfs files to an attribute group so the
driver core will correctly add/remove them all at once and handle errors
with them, and correctly check for creating a new workqueue and
unwinding if that fails.

Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/soc/codecs/cs43130.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/sound/soc/codecs/cs43130.c b/sound/soc/codecs/cs43130.c
index c2b6f0ae6d57..80cd3ea0c157 100644
--- a/sound/soc/codecs/cs43130.c
+++ b/sound/soc/codecs/cs43130.c
@@ -1735,6 +1735,14 @@ static DEVICE_ATTR(hpload_dc_r, 0444, cs43130_show_dc_r, NULL);
 static DEVICE_ATTR(hpload_ac_l, 0444, cs43130_show_ac_l, NULL);
 static DEVICE_ATTR(hpload_ac_r, 0444, cs43130_show_ac_r, NULL);
 
+static struct attribute *hpload_attrs[] = {
+	&dev_attr_hpload_dc_l.attr,
+	&dev_attr_hpload_dc_r.attr,
+	&dev_attr_hpload_ac_l.attr,
+	&dev_attr_hpload_ac_r.attr,
+};
+ATTRIBUTE_GROUPS(hpload);
+
 static struct reg_sequence hp_en_cal_seq[] = {
 	{CS43130_INT_MASK_4, CS43130_INT_MASK_ALL},
 	{CS43130_HP_MEAS_LOAD_1, 0},
@@ -2302,23 +2310,15 @@ static int cs43130_probe(struct snd_soc_component *component)
 
 	cs43130->hpload_done = false;
 	if (cs43130->dc_meas) {
-		ret = device_create_file(component->dev, &dev_attr_hpload_dc_l);
-		if (ret < 0)
-			return ret;
-
-		ret = device_create_file(component->dev, &dev_attr_hpload_dc_r);
-		if (ret < 0)
-			return ret;
-
-		ret = device_create_file(component->dev, &dev_attr_hpload_ac_l);
-		if (ret < 0)
-			return ret;
-
-		ret = device_create_file(component->dev, &dev_attr_hpload_ac_r);
-		if (ret < 0)
+		ret = sysfs_create_groups(&component->dev->kobj, hpload_groups);
+		if (ret)
 			return ret;
 
 		cs43130->wq = create_singlethread_workqueue("cs43130_hp");
+		if (!cs43130->wq) {
+			sysfs_remove_groups(&component->dev->kobj, hpload_groups);
+			return -ENOMEM;
+		}
 		INIT_WORK(&cs43130->work, cs43130_imp_meas);
 	}
 
-- 
2.31.1