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Commit d5f43c1e authored by Erwan Bracq's avatar Erwan Bracq Committed by David S. Miller
Browse files

caif-spi: Bugfix for dump upon device removal 



Fix dump upon device removal, by moving deinitialization from
platform-device-remove to network-interface-uninit.

Signed-off-by: default avatarSjur Brændeland <sjur.brandeland@stericsson.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9e998a75

drivers/net/caif/caif_spi.c

+90 −86
Original line number Diff line number Diff line
@@ -226,7 +226,7 @@ static ssize_t dbgfs_frame(struct file *file, char __user *user_buf, 
			"Tx data (Len: %d):\n", cfspi->tx_cpck_len);



	len += print_frame((buf + len), (DEBUGFS_BUF_SIZE - len),

			   cfspi->xfer.va_tx,

			   cfspi->xfer.va_tx[0],

			   (cfspi->tx_cpck_len + SPI_CMD_SZ), 100);



	len += snprintf((buf + len), (DEBUGFS_BUF_SIZE - len),
@@ -599,48 +599,11 @@ static int cfspi_close(struct net_device *dev) 
	netif_stop_queue(dev);

	return 0;

}

static const struct net_device_ops cfspi_ops = {

	.ndo_open = cfspi_open,

	.ndo_stop = cfspi_close,

	.ndo_start_xmit = cfspi_xmit

};



static void cfspi_setup(struct net_device *dev)

static int cfspi_init(struct net_device *dev)

{

	int res = 0;

	struct cfspi *cfspi = netdev_priv(dev);

	dev->features = 0;

	dev->netdev_ops = &cfspi_ops;

	dev->type = ARPHRD_CAIF;

	dev->flags = IFF_NOARP | IFF_POINTOPOINT;

	dev->tx_queue_len = 0;

	dev->mtu = SPI_MAX_PAYLOAD_SIZE;

	dev->destructor = free_netdev;

	skb_queue_head_init(&cfspi->qhead);

	skb_queue_head_init(&cfspi->chead);

	cfspi->cfdev.link_select = CAIF_LINK_HIGH_BANDW;

	cfspi->cfdev.use_frag = false;

	cfspi->cfdev.use_stx = false;

	cfspi->cfdev.use_fcs = false;

	cfspi->ndev = dev;

}



int cfspi_spi_probe(struct platform_device *pdev)

{

	struct cfspi *cfspi = NULL;

	struct net_device *ndev;

	struct cfspi_dev *dev;

	int res;

	dev = (struct cfspi_dev *)pdev->dev.platform_data;



	ndev = alloc_netdev(sizeof(struct cfspi),

			"cfspi%d", cfspi_setup);

	if (!ndev)

		return -ENOMEM;



	cfspi = netdev_priv(ndev);

	netif_stop_queue(ndev);

	cfspi->ndev = ndev;

	cfspi->pdev = pdev;



	/* Set flow info. */

	cfspi->flow_off_sent = 0;
@@ -656,16 +619,11 @@ int cfspi_spi_probe(struct platform_device *pdev) 
		cfspi->slave_talked = false;

	}



	/* Assign the SPI device. */

	cfspi->dev = dev;

	/* Assign the device ifc to this SPI interface. */

	dev->ifc = &cfspi->ifc;



	/* Allocate DMA buffers. */

	cfspi->xfer.va_tx = dma_alloc(&cfspi->xfer.pa_tx);

	if (!cfspi->xfer.va_tx) {

	cfspi->xfer.va_tx[0] = dma_alloc(&cfspi->xfer.pa_tx[0]);

	if (!cfspi->xfer.va_tx[0]) {

		res = -ENODEV;

		goto err_dma_alloc_tx;

		goto err_dma_alloc_tx_0;

	}



	cfspi->xfer.va_rx = dma_alloc(&cfspi->xfer.pa_rx);
@@ -714,59 +672,105 @@ int cfspi_spi_probe(struct platform_device *pdev) 
	/* Schedule the work queue. */

	queue_work(cfspi->wq, &cfspi->work);



	/* Register network device. */

	res = register_netdev(ndev);

	if (res) {

		printk(KERN_ERR "CFSPI: Reg. error: %d.\n", res);

		goto err_net_reg;

	}

	return res;

	return 0;



 err_net_reg:

	dev_debugfs_rem(cfspi);

	set_bit(SPI_TERMINATE, &cfspi->state);

	wake_up_interruptible(&cfspi->wait);

	destroy_workqueue(cfspi->wq);

 err_create_wq:

	dma_free(cfspi->xfer.va_rx, cfspi->xfer.pa_rx);

 err_dma_alloc_rx:

	dma_free(cfspi->xfer.va_tx, cfspi->xfer.pa_tx);

 err_dma_alloc_tx:

	free_netdev(ndev);



	dma_free(cfspi->xfer.va_tx[0], cfspi->xfer.pa_tx[0]);

 err_dma_alloc_tx_0:

	return res;

}



int cfspi_spi_remove(struct platform_device *pdev)

static void cfspi_uninit(struct net_device *dev)

{

	struct list_head *list_node;

	struct list_head *n;

	struct cfspi *cfspi = NULL;

	struct cfspi_dev *dev;

	struct cfspi *cfspi = netdev_priv(dev);



	dev = (struct cfspi_dev *)pdev->dev.platform_data;

	spin_lock(&cfspi_list_lock);

	list_for_each_safe(list_node, n, &cfspi_list) {

		cfspi = list_entry(list_node, struct cfspi, list);

		/* Find the corresponding device. */

		if (cfspi->dev == dev) {

	/* Remove from list. */

			list_del(list_node);

	spin_lock(&cfspi_list_lock);

	list_del(&cfspi->list);

	spin_unlock(&cfspi_list_lock);



	cfspi->ndev = NULL;

	/* Free DMA buffers. */

	dma_free(cfspi->xfer.va_rx, cfspi->xfer.pa_rx);

			dma_free(cfspi->xfer.va_tx, cfspi->xfer.pa_tx);

	dma_free(cfspi->xfer.va_tx[0], cfspi->xfer.pa_tx[0]);

	set_bit(SPI_TERMINATE, &cfspi->state);

	wake_up_interruptible(&cfspi->wait);

	destroy_workqueue(cfspi->wq);

	/* Destroy debugfs directory and files. */

	dev_debugfs_rem(cfspi);

			unregister_netdev(cfspi->ndev);

			spin_unlock(&cfspi_list_lock);

			return 0;

	return;

}



static const struct net_device_ops cfspi_ops = {

	.ndo_open = cfspi_open,

	.ndo_stop = cfspi_close,

	.ndo_init = cfspi_init,

	.ndo_uninit = cfspi_uninit,

	.ndo_start_xmit = cfspi_xmit

};



static void cfspi_setup(struct net_device *dev)

{

	struct cfspi *cfspi = netdev_priv(dev);

	dev->features = 0;

	dev->netdev_ops = &cfspi_ops;

	dev->type = ARPHRD_CAIF;

	dev->flags = IFF_NOARP | IFF_POINTOPOINT;

	dev->tx_queue_len = 0;

	dev->mtu = SPI_MAX_PAYLOAD_SIZE;

	dev->destructor = free_netdev;

	skb_queue_head_init(&cfspi->qhead);

	skb_queue_head_init(&cfspi->chead);

	cfspi->cfdev.link_select = CAIF_LINK_HIGH_BANDW;

	cfspi->cfdev.use_frag = false;

	cfspi->cfdev.use_stx = false;

	cfspi->cfdev.use_fcs = false;

	cfspi->ndev = dev;

}

	spin_unlock(&cfspi_list_lock);



int cfspi_spi_probe(struct platform_device *pdev)

{

	struct cfspi *cfspi = NULL;

	struct net_device *ndev;

	struct cfspi_dev *dev;

	int res;

	dev = (struct cfspi_dev *)pdev->dev.platform_data;



	ndev = alloc_netdev(sizeof(struct cfspi),

			"cfspi%d", cfspi_setup);

	if (!dev)

		return -ENODEV;



	cfspi = netdev_priv(ndev);

	netif_stop_queue(ndev);

	cfspi->ndev = ndev;

	cfspi->pdev = pdev;



	/* Assign the SPI device. */

	cfspi->dev = dev;

	/* Assign the device ifc to this SPI interface. */

	dev->ifc = &cfspi->ifc;



	/* Register network device. */

	res = register_netdev(ndev);

	if (res) {

		printk(KERN_ERR "CFSPI: Reg. error: %d.\n", res);

		goto err_net_reg;

	}

	return res;



 err_net_reg:

	free_netdev(ndev);



	return res;

}



int cfspi_spi_remove(struct platform_device *pdev)

{

	/* Everything is done in cfspi_uninit(). */

	return 0;

}



static void __exit cfspi_exit_module(void)
@@ -777,7 +781,7 @@ static void __exit cfspi_exit_module(void) 


	list_for_each_safe(list_node, n, &cfspi_list) {

		cfspi = list_entry(list_node, struct cfspi, list);

		platform_device_unregister(cfspi->pdev);

		unregister_netdev(cfspi->ndev);

	}



	/* Destroy sysfs files. */

include/net/caif/caif_spi.h

+2 −2
Original line number Diff line number Diff line
@@ -55,8 +55,8 @@ 
struct cfspi_xfer {

	u16 tx_dma_len;

	u16 rx_dma_len;

	void *va_tx;

	dma_addr_t pa_tx;

	void *va_tx[2];

	dma_addr_t pa_tx[2];

	void *va_rx;

	dma_addr_t pa_rx;

};