linux-kernel - [PATCH 14/17] staging: nuc-wmi: fix software blink behavior logic

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Message-Id: <26d3ab7a03cb83ec56205add6cd80b8738cd96b0.1621161037.git.mchehab+huawei@kernel.org>
Date:   Sun, 16 May 2021 12:53:42 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     gregkh@...uxfoundation.org
Cc:     linuxarm@...wei.com, mauro.chehab@...wei.com,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "Pavel Machek" <pavel@....cz>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org,
        linux-leds@...r.kernel.org, linux-staging@...ts.linux.dev
Subject: [PATCH 14/17] staging: nuc-wmi: fix software blink behavior logic

The is_visible logic for it is plain wrong:

1. it is used only during devnode creation;
2. it was using the wrong field (id, instead of indicator).

Fix it.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 drivers/staging/nuc-led/nuc-wmi.c | 30 ++++++++++++------------------
 1 file changed, 12 insertions(+), 18 deletions(-)

diff --git a/drivers/staging/nuc-led/nuc-wmi.c b/drivers/staging/nuc-led/nuc-wmi.c
index 68143d45c34c..fab0094a20e4 100644
--- a/drivers/staging/nuc-led/nuc-wmi.c
+++ b/drivers/staging/nuc-led/nuc-wmi.c
@@ -1476,6 +1476,9 @@ static ssize_t show_blink_behavior(struct device *dev,
 	if (led->api_rev == LED_API_NUC6)
 		return nuc6_show_blink_behavior(dev, attr, buf);
 
+	if (led->indicator != LED_IND_SOFTWARE)
+		return -EINVAL;
+
 	return offset_show_blink_behavior(dev, attr, 0, buf);
 }
 
@@ -1489,6 +1492,9 @@ static ssize_t store_blink_behavior(struct device *dev,
 	if (led->api_rev == LED_API_NUC6)
 		return nuc6_store_blink_behavior(dev, attr, buf, len);
 
+	if (led->indicator != LED_IND_SOFTWARE)
+		return -EINVAL;
+
 	return offset_store_blink_behavior(dev, attr, 0, buf, len);
 }
 
@@ -1593,6 +1599,9 @@ static ssize_t show_blink_frequency(struct device *dev,
 	if (led->api_rev == LED_API_NUC6)
 		return nuc6_show_blink_frequency(dev, attr, buf);
 
+	if (led->indicator != LED_IND_SOFTWARE)
+		return -EINVAL;
+
 	return offset_show_blink_frequency(dev, attr, 0, buf);
 }
 
@@ -1606,26 +1615,12 @@ static ssize_t store_blink_frequency(struct device *dev,
 	if (led->api_rev == LED_API_NUC6)
 		return nuc6_store_blink_frequency(dev, attr, buf, len);
 
+	if (led->indicator != LED_IND_SOFTWARE)
+		return -EINVAL;
+
 	return offset_store_blink_frequency(dev, attr, 0, buf, len);
 }
 
-static umode_t nuc_wmi_led_blink_is_visible(struct kobject *kobj,
-					    struct attribute *attr, int idx)
-{
-	struct device *dev = kobj_to_dev(kobj);
-	struct led_classdev *cdev = dev_get_drvdata(dev);
-	struct nuc_nmi_led *led = container_of(cdev, struct nuc_nmi_led, cdev);
-	umode_t mode = attr->mode;
-
-	if (led->api_rev == LED_API_NUC6)
-		return mode;
-
-	if (led->id == LED_IND_SOFTWARE)
-		return mode;
-
-	return 0;
-}
-
 /* HDD activity behavior */
 static ssize_t show_hdd_default(struct device *dev,
 				   struct device_attribute *attr,
@@ -1785,7 +1780,6 @@ static struct attribute *nuc_wmi_led_blink_behavior_attr[] = {
 };
 
 static const struct attribute_group nuc_wmi_led_blink_attribute_group = {
-	.is_visible = nuc_wmi_led_blink_is_visible,
 	.attrs = nuc_wmi_led_blink_behavior_attr,
 };
 
-- 
2.31.1