linux-kernel - [PATCH 1/2] staging: pi433: fix (NULL device *) in log message

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Date:   Tue, 21 Nov 2017 00:03:57 +0100
From:   Marcin Ciupak <marcin.s.ciupak@...il.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-kernel@...r.kernel.org, devel@...verdev.osuosl.org
Subject: [PATCH 1/2] staging: pi433: fix (NULL device *) in log message

(NULL device *) is printed in log message in pi433_probe and
pi433_get_minor functions due to device->dev being used prior to call to
device_create function.

Signed-off-by: Marcin Ciupak <marcin.s.ciupak@...il.com>
---
 drivers/staging/pi433/pi433_if.c | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/pi433/pi433_if.c b/drivers/staging/pi433/pi433_if.c
index d946838450d4..bc17676169cb 100644
--- a/drivers/staging/pi433/pi433_if.c
+++ b/drivers/staging/pi433/pi433_if.c
@@ -1051,7 +1051,7 @@ static int pi433_get_minor(struct pi433_device *device)
 		device->minor = retval;
 		retval = 0;
 	} else if (retval == -ENOSPC) {
-		dev_err(device->dev, "too many pi433 devices\n");
+		dev_err(&device->spi->dev, "too many pi433 devices\n");
 		retval = -EINVAL;
 	}
 	mutex_unlock(&minor_lock);
@@ -1159,19 +1159,10 @@ static int pi433_probe(struct spi_device *spi)
 	SET_CHECKED(rf69_set_output_power_level	(spi, 13));
 	SET_CHECKED(rf69_set_antenna_impedance	(spi, fiftyOhm));
 
-	/* start tx thread */
-	device->tx_task_struct = kthread_run(pi433_tx_thread,
-					     device,
-					     "pi433_tx_task");
-	if (IS_ERR(device->tx_task_struct)) {
-		dev_dbg(device->dev, "start of send thread failed");
-		goto send_thread_failed;
-	}
-
 	/* determ minor number */
 	retval = pi433_get_minor(device);
 	if (retval) {
-		dev_dbg(device->dev, "get of minor number failed");
+		dev_dbg(&spi->dev, "get of minor number failed");
 		goto minor_failed;
 	}
 
@@ -1194,6 +1185,15 @@ static int pi433_probe(struct spi_device *spi)
 			device->minor);
 	}
 
+	/* start tx thread */
+	device->tx_task_struct = kthread_run(pi433_tx_thread,
+					     device,
+					     "pi433_tx_task");
+	if (IS_ERR(device->tx_task_struct)) {
+		dev_dbg(device->dev, "start of send thread failed");
+		goto send_thread_failed;
+	}
+
 	/* create cdev */
 	device->cdev = cdev_alloc();
 	device->cdev->owner = THIS_MODULE;
@@ -1210,12 +1210,12 @@ static int pi433_probe(struct spi_device *spi)
 	return 0;
 
 cdev_failed:
+	kthread_stop(device->tx_task_struct);
+send_thread_failed:
 	device_destroy(pi433_class, device->devt);
 device_create_failed:
 	pi433_free_minor(device);
 minor_failed:
-	kthread_stop(device->tx_task_struct);
-send_thread_failed:
 	free_GPIOs(device);
 GPIO_failed:
 	kfree(device);
-- 
2.15.0