mrf24j40: add device managed APIs

adds the device managed APIs so that no need worry about
freeing the resources.

Signed-off-by: Varka Bhadram <varkab@cdac.in>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ieee802154/mrf24j40.c b/drivers/net/ieee802154/mrf24j40.c
index 78a6552..4048062 100644 (file)
--- a/drivers/net/ieee802154/mrf24j40.c
+++ b/drivers/net/ieee802154/mrf24j40.c
@@ -618,12 +618,12 @@ 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);
+               goto err_ret;
+       devrec->buf = devm_kzalloc(&spi->dev, 3, GFP_KERNEL);
        if (!devrec->buf)
-               goto err_buf;
+               goto err_ret;
 
        spi->mode = SPI_MODE_0; /* TODO: Is this appropriate for right here? */
        if (spi->max_speed_hz > MAX_SPI_SPEED_HZ)
@@ -638,7 +638,7 @@ static int mrf24j40_probe(struct spi_device *spi)
 
        devrec->dev = ieee802154_alloc_device(0, &mrf24j40_ops);
        if (!devrec->dev)
-               goto err_alloc_dev;
+               goto err_ret;
 
        devrec->dev->priv = devrec;
        devrec->dev->parent = &devrec->spi->dev;
@@ -676,12 +676,13 @@ 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");
@@ -695,11 +696,7 @@ err_read_reg:
        ieee802154_unregister_device(devrec->dev);
 err_register_device:
        ieee802154_free_device(devrec->dev);
-err_alloc_dev:
-       kfree(devrec->buf);
-err_buf:
-       kfree(devrec);
-err_devrec:
+err_ret:
        return ret;
 }
 
@@ -709,15 +706,11 @@ 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;
 }