[PATCH] mrf24j40: add managed API's provided by device layer

[PATCH] mrf24j40: add managed API's provided by device layer

[Varka Bhadram]

This patch adds the managed APIs to the deriver code. By using this we need
not to worry about freeing the memory and irq numbers.

Thanks and Regards,
Varka Bhadram

Signed-off-by: Varka Bhadram <varkab@cdac.in>
---
 drivers/net/ieee802154/mrf24j40.c |   22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 78a6552..729ec0f 100644
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -618,10 +618,11 @@ static int mrf24j40_probe(struct spi_device *spi)
 
 	printk(KERN_INFO "mrf24j40: probe(). IRQ: %d\n", spi->irq);
 
-	devrec = kzalloc(sizeof(struct mrf24j40), GFP_KERNEL);
+	devrec = devm_kzalloc(spi->dev,
+			sizeof(struct mrf24j40), GFP_KERNEL);
 	if (!devrec)
 		goto err_devrec;
-	devrec->buf = kzalloc(3, GFP_KERNEL);
+	devrec->buf = devm_kzalloc(spi->dev, 3, GFP_KERNEL);
 	if (!devrec->buf)
 		goto err_buf;
 
@@ -676,12 +677,13 @@ static int mrf24j40_probe(struct spi_device *spi)
 	val &= ~0x3; /* Clear RX mode (normal) */
 	write_short_reg(devrec, REG_RXMCR, val);
 
-	ret = request_threaded_irq(spi->irq,
-				   NULL,
-				   mrf24j40_isr,
-				   IRQF_TRIGGER_LOW|IRQF_ONESHOT,
-				   dev_name(&spi->dev),
-				   devrec);
+	ret = devm_request_threaded_irq(spi->dev,
+					spi->irq,
+					NULL,
+					mrf24j40_isr,
+					IRQF_TRIGGER_LOW|IRQF_ONESHOT,
+					dev_name(&spi->dev),
+					devrec);
 
 	if (ret) {
 		dev_err(printdev(devrec), "Unable to get IRQ");
@@ -709,15 +711,11 @@ static int mrf24j40_remove(struct spi_device *spi)
 
 	dev_dbg(printdev(devrec), "remove\n");
 
-	free_irq(spi->irq, devrec);
 	ieee802154_unregister_device(devrec->dev);
 	ieee802154_free_device(devrec->dev);
 	/* TODO: Will ieee802154_free_device() wait until ->xmit() is
 	 * complete? */
 
-	/* Clean up the SPI stuff. */
-	kfree(devrec->buf);
-	kfree(devrec);
 	return 0;
 }
 
-- 
1.7.9.5

Re: [PATCH] mrf24j40: add managed API's provided by device layer

[Sergei Shtylyov]

Hello.

On 05/29/2014 08:17 AM, Varka Bhadram wrote:

> This patch adds the managed APIs to the deriver code. By using this we need
> not to worry about freeing the memory and irq numbers.

> Thanks and Regards,
> Varka Bhadram

    This is not desirable thing in the patch changelog, maintainer will have 
to edit it out...

> Signed-off-by: Varka Bhadram <varkab@cdac.in>
> ---
>   drivers/net/ieee802154/mrf24j40.c |   22 ++++++++++------------
>   1 file changed, 10 insertions(+), 12 deletions(-)

> diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
> index 78a6552..729ec0f 100644
> --- a/drivers/net/ieee802154/mrf24j40.c
> +++ b/drivers/net/ieee802154/mrf24j40.c
> @@ -618,10 +618,11 @@ static int mrf24j40_probe(struct spi_device *spi)
>
>   	printk(KERN_INFO "mrf24j40: probe(). IRQ: %d\n", spi->irq);
>
> -	devrec = kzalloc(sizeof(struct mrf24j40), GFP_KERNEL);
> +	devrec = devm_kzalloc(spi->dev,
> +			sizeof(struct mrf24j40), GFP_KERNEL);

    Continuation line should start under the next character after ( on the 
previous line, according to the networking coding style.

[...]

WBR, Sergei