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Commit ee231aee authored by Octavian Purdila's avatar Octavian Purdila Committed by Lee Jones
Browse files

mfd: dln2: Add start/stop RX URBs helpers 



This is in preparation for adding suspend / resume support.

Signed-off-by: default avatarOctavian Purdila <octavian.purdila@intel.com>
Reviewed-by: default avatarJohan Hovold <johan@kernel.org>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent c68a8658

drivers/mfd/dln2.c

+41 −10
Original line number Diff line number Diff line
@@ -587,12 +587,19 @@ static void dln2_free_rx_urbs(struct dln2_dev *dln2) 
	int i;



	for (i = 0; i < DLN2_MAX_URBS; i++) {

		usb_kill_urb(dln2->rx_urb[i]);

		usb_free_urb(dln2->rx_urb[i]);

		kfree(dln2->rx_buf[i]);

	}

}



static void dln2_stop_rx_urbs(struct dln2_dev *dln2)

{

	int i;



	for (i = 0; i < DLN2_MAX_URBS; i++)

		usb_kill_urb(dln2->rx_urb[i]);

}



static void dln2_free(struct dln2_dev *dln2)

{

	dln2_free_rx_urbs(dln2);
@@ -604,9 +611,7 @@ static int dln2_setup_rx_urbs(struct dln2_dev *dln2, 
			      struct usb_host_interface *hostif)

{

	int i;

	int ret;

	const int rx_max_size = DLN2_RX_BUF_SIZE;

	struct device *dev = &dln2->interface->dev;



	for (i = 0; i < DLN2_MAX_URBS; i++) {

		dln2->rx_buf[i] = kmalloc(rx_max_size, GFP_KERNEL);
@@ -620,8 +625,19 @@ static int dln2_setup_rx_urbs(struct dln2_dev *dln2, 
		usb_fill_bulk_urb(dln2->rx_urb[i], dln2->usb_dev,

				  usb_rcvbulkpipe(dln2->usb_dev, dln2->ep_in),

				  dln2->rx_buf[i], rx_max_size, dln2_rx, dln2);

	}



	return 0;

}



		ret = usb_submit_urb(dln2->rx_urb[i], GFP_KERNEL);

static int dln2_start_rx_urbs(struct dln2_dev *dln2, gfp_t gfp)

{

	struct device *dev = &dln2->interface->dev;

	int ret;

	int i;



	for (i = 0; i < DLN2_MAX_URBS; i++) {

		ret = usb_submit_urb(dln2->rx_urb[i], gfp);

		if (ret < 0) {

			dev_err(dev, "failed to submit RX URB: %d\n", ret);

			return ret;
@@ -665,9 +681,8 @@ static const struct mfd_cell dln2_devs[] = { 
	},

};



static void dln2_disconnect(struct usb_interface *interface)

static void dln2_stop(struct dln2_dev *dln2)

{

	struct dln2_dev *dln2 = usb_get_intfdata(interface);

	int i, j;



	/* don't allow starting new transfers */
@@ -696,6 +711,15 @@ static void dln2_disconnect(struct usb_interface *interface) 
	/* wait for transfers to end */

	wait_event(dln2->disconnect_wq, !dln2->active_transfers);



	dln2_stop_rx_urbs(dln2);

}



static void dln2_disconnect(struct usb_interface *interface)

{

	struct dln2_dev *dln2 = usb_get_intfdata(interface);



	dln2_stop(dln2);



	mfd_remove_devices(&interface->dev);



	dln2_free(dln2);
@@ -738,23 +762,30 @@ static int dln2_probe(struct usb_interface *interface, 


	ret = dln2_setup_rx_urbs(dln2, hostif);

	if (ret)

		goto out_cleanup;

		goto out_free;



	ret = dln2_start_rx_urbs(dln2, GFP_KERNEL);

	if (ret)

		goto out_stop_rx;



	ret = dln2_hw_init(dln2);

	if (ret < 0) {

		dev_err(dev, "failed to initialize hardware\n");

		goto out_cleanup;

		goto out_stop_rx;

	}



	ret = mfd_add_hotplug_devices(dev, dln2_devs, ARRAY_SIZE(dln2_devs));

	if (ret != 0) {

		dev_err(dev, "failed to add mfd devices to core\n");

		goto out_cleanup;

		goto out_stop_rx;

	}



	return 0;



out_cleanup:

out_stop_rx:

	dln2_stop_rx_urbs(dln2);



out_free:

	dln2_free(dln2);



	return ret;