diff mbox series

[lora-next,v2,2/8] net: lora: sx1301: convert to devm registration of netdev

Message ID 1533818018-29005-2-git-send-email-ben.whitten@lairdtech.com
State Not Applicable, archived
Delegated to: David Miller
Headers show
Series [lora-next,v2,1/8] net: lora: add methods for devm registration | expand

Commit Message

Ben Whitten Aug. 9, 2018, 12:33 p.m. UTC 
We allow the devres framework handle the clean removal of resources on
teardown of the device, in this case the SPI device, saving lengthy
unwind code and improving clarity.

Signed-off-by: Ben Whitten <ben.whitten@lairdtech.com>
---
 drivers/net/lora/sx1301.c | 87 +++++++++++++++--------------------------------
 1 file changed, 27 insertions(+), 60 deletions(-)

Comments

Andreas Färber Aug. 9, 2018, 7:27 p.m. UTC | #1 
Am 09.08.2018 um 14:33 schrieb Ben Whitten:
> We allow the devres framework handle the clean removal of resources on
> teardown of the device, in this case the SPI device, saving lengthy
> unwind code and improving clarity.
> 
> Signed-off-by: Ben Whitten <ben.whitten@lairdtech.com>
> ---
>  drivers/net/lora/sx1301.c | 87 +++++++++++++++--------------------------------
>  1 file changed, 27 insertions(+), 60 deletions(-)
> 
> diff --git a/drivers/net/lora/sx1301.c b/drivers/net/lora/sx1301.c
> index 5342b61..3c09f5a 100644
> --- a/drivers/net/lora/sx1301.c
> +++ b/drivers/net/lora/sx1301.c
[...]
>  static int sx1301_remove(struct spi_device *spi)
>  {
> -	struct net_device *netdev = spi_get_drvdata(spi);
> -
> -	//unregister_loradev(netdev);

Thanks, this part we'll still need later though.

Applying.

Regards,
Andreas

> -	free_loradev(netdev);
> -
>  	dev_info(&spi->dev, "SX1301 module removed\n");
>  
>  	return 0;
[snip]
diff mbox series

Patch

diff --git a/drivers/net/lora/sx1301.c b/drivers/net/lora/sx1301.c
index 5342b61..3c09f5a 100644
--- a/drivers/net/lora/sx1301.c
+++ b/drivers/net/lora/sx1301.c
@@ -3,6 +3,7 @@ 
  * Semtech SX1301 LoRa concentrator
  *
  * Copyright (c) 2018 Andreas Färber
+ * Copyright (c) 2018 Ben Whitten
  *
  * Based on SX1301 HAL code:
  * Copyright (c) 2013 Semtech-Cycleo
@@ -637,20 +638,17 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_read(spi, REG_VERSION, &val);
 	if (ret) {
 		dev_err(&spi->dev, "version read failed\n");
-		goto err_version;
+		return ret;
 	}
 
 	if (val != 103) {
 		dev_err(&spi->dev, "unexpected version: %u\n", val);
-		ret = -ENXIO;
-		goto err_version;
+		return -ENXIO;
 	}
 
-	netdev = alloc_loradev(sizeof(*priv));
-	if (!netdev) {
-		ret = -ENOMEM;
-		goto err_alloc_loradev;
-	}
+	netdev = devm_alloc_loradev(&spi->dev, sizeof(*priv));
+	if (!netdev)
+		return -ENOMEM;
 
 	priv = netdev_priv(netdev);
 	priv->rst_gpio = rst;
@@ -662,19 +660,19 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_write(spi, REG_PAGE_RESET, 0);
 	if (ret) {
 		dev_err(&spi->dev, "page/reset write failed\n");
-		goto err_init_page;
+		return ret;
 	}
 
 	ret = sx1301_soft_reset(spi);
 	if (ret) {
 		dev_err(&spi->dev, "soft reset failed\n");
-		goto err_soft_reset;
+		return ret;
 	}
 
 	ret = sx1301_read(spi, 16, &val);
 	if (ret) {
 		dev_err(&spi->dev, "16 read failed\n");
-		goto err_read_global_en_0;
+		return ret;
 	}
 
 	val &= ~REG_16_GLOBAL_EN;
@@ -682,13 +680,13 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_write(spi, 16, val);
 	if (ret) {
 		dev_err(&spi->dev, "16 write failed\n");
-		goto err_write_global_en_0;
+		return ret;
 	}
 
 	ret = sx1301_read(spi, 17, &val);
 	if (ret) {
 		dev_err(&spi->dev, "17 read failed\n");
-		goto err_read_clk32m_0;
+		return ret;
 	}
 
 	val &= ~REG_17_CLK32M_EN;
@@ -696,7 +694,7 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_write(spi, 17, val);
 	if (ret) {
 		dev_err(&spi->dev, "17 write failed\n");
-		goto err_write_clk32m_0;
+		return ret;
 	}
 
 	ret = sx1301_page_read(spi, 2, 43, &val);
@@ -749,8 +747,7 @@  static int sx1301_probe(struct spi_device *spi)
 
 	priv->radio_a_ctrl = spi_alloc_master(&spi->dev, sizeof(*radio));
 	if (!priv->radio_a_ctrl) {
-		ret = -ENOMEM;
-		goto err_radio_a_alloc;
+		return -ENOMEM;
 	}
 
 	sx1301_radio_setup(priv->radio_a_ctrl);
@@ -765,15 +762,14 @@  static int sx1301_probe(struct spi_device *spi)
 	if (ret) {
 		dev_err(&spi->dev, "radio A SPI register failed\n");
 		spi_controller_put(priv->radio_a_ctrl);
-		goto err_radio_a_register;
+		return ret;
 	}
 
 	/* radio B */
 
 	priv->radio_b_ctrl = spi_alloc_master(&spi->dev, sizeof(*radio));
 	if (!priv->radio_b_ctrl) {
-		ret = -ENOMEM;
-		goto err_radio_b_alloc;
+		return -ENOMEM;
 	}
 
 	sx1301_radio_setup(priv->radio_b_ctrl);
@@ -788,7 +784,7 @@  static int sx1301_probe(struct spi_device *spi)
 	if (ret) {
 		dev_err(&spi->dev, "radio B SPI register failed\n");
 		spi_controller_put(priv->radio_b_ctrl);
-		goto err_radio_b_register;
+		return ret;
 	}
 
 	/* GPIO */
@@ -796,7 +792,7 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_read(spi, REG_GPIO_MODE, &val);
 	if (ret) {
 		dev_err(&spi->dev, "GPIO mode read failed\n");
-		goto err_read_gpio_mode;
+		return ret;
 	}
 
 	val |= GENMASK(4, 0);
@@ -804,13 +800,13 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_write(spi, REG_GPIO_MODE, val);
 	if (ret) {
 		dev_err(&spi->dev, "GPIO mode write failed\n");
-		goto err_write_gpio_mode;
+		return ret;
 	}
 
 	ret = sx1301_read(spi, REG_GPIO_SELECT_OUTPUT, &val);
 	if (ret) {
 		dev_err(&spi->dev, "GPIO select output read failed\n");
-		goto err_read_gpio_select_output;
+		return ret;
 	}
 
 	val &= ~GENMASK(3, 0);
@@ -819,7 +815,7 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_write(spi, REG_GPIO_SELECT_OUTPUT, val);
 	if (ret) {
 		dev_err(&spi->dev, "GPIO select output write failed\n");
-		goto err_write_gpio_select_output;
+		return ret;
 	}
 
 	/* TODO LBT */
@@ -827,7 +823,7 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_read(spi, 16, &val);
 	if (ret) {
 		dev_err(&spi->dev, "16 read (1) failed\n");
-		goto err_read_global_en_1;
+		return ret;
 	}
 
 	val |= REG_16_GLOBAL_EN;
@@ -835,13 +831,13 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_write(spi, 16, val);
 	if (ret) {
 		dev_err(&spi->dev, "16 write (1) failed\n");
-		goto err_write_global_en_1;
+		return ret;
 	}
 
 	ret = sx1301_read(spi, 17, &val);
 	if (ret) {
 		dev_err(&spi->dev, "17 read (1) failed\n");
-		goto err_read_clk32m_1;
+		return ret;
 	}
 
 	val |= REG_17_CLK32M_EN;
@@ -849,58 +845,28 @@  static int sx1301_probe(struct spi_device *spi)
 	ret = sx1301_write(spi, 17, val);
 	if (ret) {
 		dev_err(&spi->dev, "17 write (1) failed\n");
-		goto err_write_clk32m_1;
+		return ret;
 	}
 
 	/* calibration */
 
 	ret = sx1301_agc_calibrate(spi);
 	if (ret)
-		goto err_agc_calibrate;
+		return ret;
 
 	/* TODO */
 
 	ret = sx1301_load_all_firmware(spi);
 	if (ret)
-		goto err_load_firmware;
+		return ret;
 
 	dev_info(&spi->dev, "SX1301 module probed\n");
 
 	return 0;
-
-err_load_firmware:
-err_agc_calibrate:
-err_write_clk32m_1:
-err_read_clk32m_1:
-err_write_global_en_1:
-err_read_global_en_1:
-err_write_gpio_select_output:
-err_read_gpio_select_output:
-err_write_gpio_mode:
-err_read_gpio_mode:
-err_radio_b_register:
-err_radio_b_alloc:
-err_radio_a_register:
-err_radio_a_alloc:
-err_write_clk32m_0:
-err_read_clk32m_0:
-err_write_global_en_0:
-err_read_global_en_0:
-err_soft_reset:
-err_init_page:
-	free_loradev(netdev);
-err_alloc_loradev:
-err_version:
-	return ret;
 }
 
 static int sx1301_remove(struct spi_device *spi)
 {
-	struct net_device *netdev = spi_get_drvdata(spi);
-
-	//unregister_loradev(netdev);
-	free_loradev(netdev);
-
 	dev_info(&spi->dev, "SX1301 module removed\n");
 
 	return 0;
@@ -927,4 +893,5 @@  module_spi_driver(sx1301_spi_driver);
 
 MODULE_DESCRIPTION("SX1301 SPI driver");
 MODULE_AUTHOR("Andreas Färber <afaerber@suse.de>");
+MODULE_AUTHOR("Ben Whitten <ben.whitten@gmail.com>");
 MODULE_LICENSE("GPL");