Commit 372959d2 authored by Ian Abbott's avatar Ian Abbott Committed by Greg Kroah-Hartman
Browse files

staging: comedi: ni_6527: use comedi attach_pci callback 



Convert this PCI driver to use the comedi `attach_pci` callback instead
of the `attach` callback for PCI auto-configuration.  There is no need
to support manual attachment of PCI devices supported by this driver, so
remove the `attach` callback altogether.

Note that this driver still uses the list of PCI "mite" devices created
by the "mite" module.  This will be dealt with by a later patch once
dynamic allocation of "mite" structures has been implemented.

Signed-off-by: default avatarIan Abbott <abbotti@mev.co.uk>
Reviewed-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent fcdd5ecd

drivers/staging/comedi/drivers/ni_6527.c

+38 −34
Original line number Diff line number Diff line
@@ -95,7 +95,6 @@ static const struct ni6527_board ni6527_boards[] = { 
	 },

};



#define n_ni6527_boards ARRAY_SIZE(ni6527_boards)

#define this_board ((const struct ni6527_board *)dev->board_ptr)



static DEFINE_PCI_DEVICE_TABLE(ni6527_pci_table) = {
@@ -114,8 +113,6 @@ struct ni6527_private { 


#define devpriv ((struct ni6527_private *)dev->private)



static int ni6527_find_device(struct comedi_device *dev, int bus, int slot);



static int ni6527_di_insn_config(struct comedi_device *dev,

				 struct comedi_subdevice *s,

				 struct comedi_insn *insn, unsigned int *data)
@@ -356,7 +353,36 @@ static int ni6527_intr_insn_config(struct comedi_device *dev, 
	return 2;

}



static int ni6527_attach(struct comedi_device *dev, struct comedi_devconfig *it)

/* FIXME: remove this when dynamic MITE allocation implemented. */

static struct mite_struct *ni6527_find_mite(struct pci_dev *pcidev)

{

	struct mite_struct *mite;



	for (mite = mite_devices; mite; mite = mite->next) {

		if (mite->used)

			continue;

		if (mite->pcidev == pcidev)

			return mite;

	}

	return NULL;

}



static const struct ni6527_board *

ni6527_find_boardinfo(struct pci_dev *pcidev)

{

	unsigned int dev_id = pcidev->device;

	unsigned int n;



	for (n = 0; n < ARRAY_SIZE(ni6527_boards); n++) {

		const struct ni6527_board *board = &ni6527_boards[n];

		if (board->dev_id == dev_id)

			return board;

	}

	return NULL;

}



static int __devinit ni6527_attach_pci(struct comedi_device *dev,

				       struct pci_dev *pcidev)

{

	struct comedi_subdevice *s;

	int ret;
@@ -365,9 +391,13 @@ static int ni6527_attach(struct comedi_device *dev, struct comedi_devconfig *it) 
	if (ret < 0)

		return ret;



	ret = ni6527_find_device(dev, it->options[0], it->options[1]);

	if (ret < 0)

		return ret;

	dev->board_ptr = ni6527_find_boardinfo(pcidev);

	if (!dev->board_ptr)

		return -ENODEV;



	devpriv->mite = ni6527_find_mite(pcidev);

	if (!devpriv->mite)

		return -ENODEV;



	ret = mite_setup(devpriv->mite);

	if (ret < 0) {
@@ -442,36 +472,10 @@ static void ni6527_detach(struct comedi_device *dev) 
		mite_unsetup(devpriv->mite);

}



static int ni6527_find_device(struct comedi_device *dev, int bus, int slot)

{

	struct mite_struct *mite;

	int i;



	for (mite = mite_devices; mite; mite = mite->next) {

		if (mite->used)

			continue;

		if (bus || slot) {

			if (bus != mite->pcidev->bus->number ||

			    slot != PCI_SLOT(mite->pcidev->devfn))

				continue;

		}

		for (i = 0; i < n_ni6527_boards; i++) {

			if (mite_device_id(mite) == ni6527_boards[i].dev_id) {

				dev->board_ptr = ni6527_boards + i;

				devpriv->mite = mite;

				return 0;

			}

		}

	}

	dev_err(dev->class_dev, DRIVER_NAME ": no device found\n");

	mite_list_devices();

	return -EIO;

}



static struct comedi_driver ni6527_driver = {

	.driver_name = DRIVER_NAME,

	.module = THIS_MODULE,

	.attach = ni6527_attach,

	.attach_pci = ni6527_attach_pci,

	.detach = ni6527_detach,

};