staging: comedi: rtd520: convert driver to attach_pci

Convert this driver to use the comedi PCI auto config mechanism
by adding an attach_pci callback.

Since this driver requires no extra configuration options, and
the attach callback is now optional, remove it.

Use the found 'dev->board_name' for the resource name passed to
comedi_pci_enable() and request_irq().

Since this driver no longer walks the pci bus to find the pci_dev,
remove the pci_dev_put() in the detach.

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

diff --git a/drivers/staging/comedi/drivers/rtd520.c b/drivers/staging/comedi/drivers/rtd520.c
index f1cd266..f7d813c 100644 (file)
--- a/drivers/staging/comedi/drivers/rtd520.c
+++ b/drivers/staging/comedi/drivers/rtd520.c
@@ -108,8 +108,6 @@ Configuration options:
 
 #include "comedi_fc.h"
 
-#define DRV_NAME "rtd520"
-
 /*======================================================================
   Driver specific stuff (tunable)
 ======================================================================*/
@@ -1392,59 +1390,39 @@ static void rtd_pci_latency_quirk(struct comedi_device *dev,
 #endif
 }
 
-static struct pci_dev *rtd_find_pci(struct comedi_device *dev,
-                                   struct comedi_devconfig *it)
+static const void *rtd_find_boardinfo(struct comedi_device *dev,
+                                     struct pci_dev *pcidev)
 {
        const struct rtdBoard *thisboard;
-       struct pci_dev *pcidev = NULL;
-       int bus = it->options[0];
-       int slot = it->options[1];
        int i;
 
-       for_each_pci_dev(pcidev) {
-               if (pcidev->vendor != PCI_VENDOR_ID_RTD)
-                       continue;
-               if (bus || slot) {
-                       if (pcidev->bus->number != bus ||
-                           PCI_SLOT(pcidev->devfn) != slot)
-                               continue;
-               }
-               for (i = 0; i < ARRAY_SIZE(rtd520Boards); i++) {
-                       thisboard = &rtd520Boards[i];
-                       if (pcidev->device == thisboard->device_id) {
-                               dev->board_ptr = thisboard;
-                               return pcidev;
-                       }
-               }
+       for (i = 0; i < ARRAY_SIZE(rtd520Boards); i++) {
+               thisboard = &rtd520Boards[i];
+               if (pcidev->device == thisboard->device_id)
+                       return thisboard;
        }
-       dev_warn(dev->class_dev,
-               "no supported board found! (req. bus/slot: %d/%d)\n",
-               bus, slot);
        return NULL;
 }
 
-static int rtd_attach(struct comedi_device *dev, struct comedi_devconfig *it)
-{                              /* board name and options flags */
+static int rtd_attach_pci(struct comedi_device *dev, struct pci_dev *pcidev)
+{
        const struct rtdBoard *thisboard;
        struct rtdPrivate *devpriv;
-       struct pci_dev *pcidev;
        struct comedi_subdevice *s;
        int ret;
 
+       thisboard = rtd_find_boardinfo(dev, pcidev);
+       if (!thisboard)
+               return -ENODEV;
+       dev->board_ptr = thisboard;
+       dev->board_name = thisboard->name;
+
        devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
        if (!devpriv)
                return -ENOMEM;
        dev->private = devpriv;
 
-       pcidev = rtd_find_pci(dev, it);
-       if (!pcidev)
-               return -EIO;
-       comedi_set_hw_dev(dev, &pcidev->dev);
-       thisboard = comedi_board(dev);
-
-       dev->board_name = thisboard->name;
-
-       ret = comedi_pci_enable(pcidev, DRV_NAME);
+       ret = comedi_pci_enable(pcidev, dev->board_name);
        if (ret)
                return ret;
        dev->iobase = 1;        /* the "detach" needs this */
@@ -1515,8 +1493,8 @@ static int rtd_attach(struct comedi_device *dev, struct comedi_devconfig *it)
        rtd_init_board(dev);
 
        /* check if our interrupt is available and get it */
-       ret = request_irq(pcidev->irq, rtd_interrupt,
-                         IRQF_SHARED, DRV_NAME, dev);
+       ret = request_irq(pcidev->irq, rtd_interrupt, IRQF_SHARED,
+                         dev->board_name, dev);
        if (ret < 0)
                return ret;
        dev->irq = pcidev->irq;
@@ -1559,14 +1537,13 @@ static void rtd_detach(struct comedi_device *dev)
        if (pcidev) {
                if (dev->iobase)
                        comedi_pci_disable(pcidev);
-               pci_dev_put(pcidev);
        }
 }
 
 static struct comedi_driver rtd520_driver = {
        .driver_name    = "rtd520",
        .module         = THIS_MODULE,
-       .attach         = rtd_attach,
+       .attach_pci     = rtd_attach_pci,
        .detach         = rtd_detach,
 };