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Message-Id: <20200116164300.6705-105-sashal@kernel.org>
Date: Thu, 16 Jan 2020 11:41:20 -0500
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Eddie James <eajames@...ux.ibm.com>,
Guenter Roeck <linux@...ck-us.net>,
Sasha Levin <sashal@...nel.org>, linux-hwmon@...r.kernel.org
Subject: [PATCH AUTOSEL 5.4 105/205] hwmon: (pmbus/ibm-cffps) Switch LEDs to blocking brightness call
From: Eddie James <eajames@...ux.ibm.com>
[ Upstream commit 9861ff954c7e83e2f738ce16fbe15f8a1e121771 ]
Since i2c_smbus functions can sleep, the brightness setting function
for this driver must be the blocking version to avoid scheduling while
atomic.
Signed-off-by: Eddie James <eajames@...ux.ibm.com>
Link: https://lore.kernel.org/r/20191106200106.29519-2-eajames@linux.ibm.com
Fixes: ef9e1cdf419a3 ("hwmon: (pmbus/cffps) Add led class device for power supply fault led")
Signed-off-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/hwmon/pmbus/ibm-cffps.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/drivers/hwmon/pmbus/ibm-cffps.c b/drivers/hwmon/pmbus/ibm-cffps.c
index d44745e498e7..aa4cdbbb100a 100644
--- a/drivers/hwmon/pmbus/ibm-cffps.c
+++ b/drivers/hwmon/pmbus/ibm-cffps.c
@@ -292,8 +292,8 @@ static int ibm_cffps_read_word_data(struct i2c_client *client, int page,
return rc;
}
-static void ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
- enum led_brightness brightness)
+static int ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness brightness)
{
int rc;
struct ibm_cffps *psu = container_of(led_cdev, struct ibm_cffps, led);
@@ -311,9 +311,11 @@ static void ibm_cffps_led_brightness_set(struct led_classdev *led_cdev,
rc = i2c_smbus_write_byte_data(psu->client, CFFPS_SYS_CONFIG_CMD,
psu->led_state);
if (rc < 0)
- return;
+ return rc;
led_cdev->brightness = brightness;
+
+ return 0;
}
static int ibm_cffps_led_blink_set(struct led_classdev *led_cdev,
@@ -351,7 +353,7 @@ static void ibm_cffps_create_led_class(struct ibm_cffps *psu)
client->addr);
psu->led.name = psu->led_name;
psu->led.max_brightness = LED_FULL;
- psu->led.brightness_set = ibm_cffps_led_brightness_set;
+ psu->led.brightness_set_blocking = ibm_cffps_led_brightness_set;
psu->led.blink_set = ibm_cffps_led_blink_set;
rc = devm_led_classdev_register(dev, &psu->led);
--
2.20.1
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