staging: comedi: ni_pcimio: 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: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/ni_pcimio.c b/drivers/staging/comedi/drivers/ni_pcimio.c
index 3c06a00..5237346 100644 (file)
--- a/drivers/staging/comedi/drivers/ni_pcimio.c
+++ b/drivers/staging/comedi/drivers/ni_pcimio.c
@@ -1188,8 +1188,6 @@ static const struct ni_board_struct ni_boards[] = {
         },
 };
 
-#define n_pcimio_boards ARRAY_SIZE(ni_boards)
-
 struct ni_private {
 NI_PRIVATE_COMMON};
 #define devpriv ((struct ni_private *)dev->private)
@@ -1502,7 +1500,6 @@ static uint32_t m_series_stc_readl(struct comedi_device *dev, int reg)
 
 #include "ni_mio_common.c"
 
-static int pcimio_find_device(struct comedi_device *dev, int bus, int slot);
 static int pcimio_ai_change(struct comedi_device *dev,
                            struct comedi_subdevice *s, unsigned long new_size);
 static int pcimio_ao_change(struct comedi_device *dev,
@@ -1589,19 +1586,52 @@ static void pcimio_detach(struct comedi_device *dev)
        }
 }
 
-static int pcimio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
+/* FIXME: remove this when dynamic MITE allocation implemented. */
+static struct mite_struct *pcimio_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 ni_board_struct *
+pcimio_find_boardinfo(struct pci_dev *pcidev)
+{
+       unsigned int device_id = pcidev->device;
+       unsigned int n;
+
+       for (n = 0; n < ARRAY_SIZE(ni_boards); n++) {
+               const struct ni_board_struct *board = &ni_boards[n];
+               if (board->device_id == device_id)
+                       return board;
+       }
+       return NULL;
+}
+
+static int __devinit pcimio_attach_pci(struct comedi_device *dev,
+                                      struct pci_dev *pcidev)
 {
        int ret;
 
-       dev_info(dev->class_dev, "ni_pcimio: attach\n");
+       dev_info(dev->class_dev, "ni_pcimio: attach %s\n", pci_name(pcidev));
 
        ret = ni_alloc_private(dev);
        if (ret < 0)
                return ret;
 
-       ret = pcimio_find_device(dev, it->options[0], it->options[1]);
-       if (ret < 0)
-               return ret;
+       dev->board_ptr = pcimio_find_boardinfo(pcidev);
+       if (!dev->board_ptr)
+               return -ENODEV;
+
+       devpriv->mite = pcimio_find_mite(pcidev);
+       if (!devpriv->mite)
+               return -ENODEV;
 
        dev_dbg(dev->class_dev, "%s\n", boardtype.name);
        dev->board_name = boardtype.name;
@@ -1672,34 +1702,6 @@ static int pcimio_attach(struct comedi_device *dev, struct comedi_devconfig *it)
        return ret;
 }
 
-static int pcimio_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_pcimio_boards; i++) {
-                       if (mite_device_id(mite) == ni_boards[i].device_id) {
-                               dev->board_ptr = ni_boards + i;
-                               devpriv->mite = mite;
-
-                               return 0;
-                       }
-               }
-       }
-       pr_warn("no device found\n");
-       mite_list_devices();
-       return -EIO;
-}
-
 static int pcimio_ai_change(struct comedi_device *dev,
                            struct comedi_subdevice *s, unsigned long new_size)
 {
@@ -1765,7 +1767,7 @@ static int pcimio_dio_change(struct comedi_device *dev,
 static struct comedi_driver ni_pcimio_driver = {
        .driver_name    = "ni_pcimio",
        .module         = THIS_MODULE,
-       .attach         = pcimio_attach,
+       .attach_pci     = pcimio_attach_pci,
        .detach         = pcimio_detach,
 };