staging: comedi: jr3_pci: replace devpriv->iobase with dev->mmio

The "jr3_pci" driver currently uses the `iobase` member of its private
device data `struct jr3_pci_dev_private` to store a pointer to its
ioremapped register region.  Use the `mmio` member of the `struct
comedi_device` to store this instead, and remove the `iobase` member.
The `iobase` member was of type `struct jr3_t __iomem *`, with the
board's complicated register layout described by `struct jr3_t`.  The
`mmio` member is a generic `void __iomem *`, so its value needs
converting to a `struct jr3_t __iomem *` for our purposes.

Change the clean-up in `jr3_pci_detach()` to call `comedi_pci_detach()`
instead of `comedi_pci_disable()`, as that will iounmap `dev->mmio` for
us.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/comedi/drivers/jr3_pci.c b/drivers/staging/comedi/drivers/jr3_pci.c
index 997f970..297ec2f 100644 (file)
--- a/drivers/staging/comedi/drivers/jr3_pci.c
+++ b/drivers/staging/comedi/drivers/jr3_pci.c
@@ -95,7 +95,6 @@ struct jr3_pci_poll_delay {
 };
 
 struct jr3_pci_dev_private {
-       struct jr3_t __iomem *iobase;
        struct timer_list timer;
 };
 
@@ -375,8 +374,7 @@ static int jr3_check_firmware(struct comedi_device *dev,
 static void jr3_write_firmware(struct comedi_device *dev,
                               int subdev, const u8 *data, size_t size)
 {
-       struct jr3_pci_dev_private *devpriv = dev->private;
-       struct jr3_t __iomem *iobase = devpriv->iobase;
+       struct jr3_t __iomem *iobase = dev->mmio;
        u32 __iomem *lo;
        u32 __iomem *hi;
        int more = 1;
@@ -634,7 +632,7 @@ static void jr3_pci_poll_dev(unsigned long data)
 static struct jr3_pci_subdev_private *
 jr3_pci_alloc_spriv(struct comedi_device *dev, struct comedi_subdevice *s)
 {
-       struct jr3_pci_dev_private *devpriv = dev->private;
+       struct jr3_t __iomem *iobase = dev->mmio;
        struct jr3_pci_subdev_private *spriv;
        int j;
        int k;
@@ -643,7 +641,7 @@ jr3_pci_alloc_spriv(struct comedi_device *dev, struct comedi_subdevice *s)
        if (!spriv)
                return NULL;
 
-       spriv->channel = &devpriv->iobase->channel[s->index].data;
+       spriv->channel = &iobase->channel[s->index].data;
 
        for (j = 0; j < 8; j++) {
                spriv->range[j].l.length = 1;
@@ -665,17 +663,17 @@ jr3_pci_alloc_spriv(struct comedi_device *dev, struct comedi_subdevice *s)
        spriv->maxdata_list[57] = 0xffff;
 
        dev_dbg(dev->class_dev, "p->channel %p %p (%tx)\n",
-               spriv->channel, devpriv->iobase,
+               spriv->channel, iobase,
                ((char __iomem *)spriv->channel -
-                (char __iomem *)devpriv->iobase));
+                (char __iomem *)iobase));
 
        return spriv;
 }
 
 static void jr3_pci_show_copyright(struct comedi_device *dev)
 {
-       struct jr3_pci_dev_private *devpriv = dev->private;
-       struct jr3_channel __iomem *ch0data = &devpriv->iobase->channel[0].data;
+       struct jr3_t __iomem *iobase = dev->mmio;
+       struct jr3_channel __iomem *ch0data = &iobase->channel[0].data;
        char copy[ARRAY_SIZE(ch0data->copyright) + 1];
        int i;
 
@@ -692,6 +690,7 @@ static int jr3_pci_auto_attach(struct comedi_device *dev,
        static const struct jr3_pci_board *board;
        struct jr3_pci_dev_private *devpriv;
        struct jr3_pci_subdev_private *spriv;
+       struct jr3_t __iomem *iobase;
        struct comedi_subdevice *s;
        int ret;
        int i;
@@ -718,10 +717,12 @@ static int jr3_pci_auto_attach(struct comedi_device *dev,
        if (ret)
                return ret;
 
-       devpriv->iobase = pci_ioremap_bar(pcidev, 0);
-       if (!devpriv->iobase)
+       dev->mmio = pci_ioremap_bar(pcidev, 0);
+       if (!dev->mmio)
                return -ENOMEM;
 
+       iobase = dev->mmio;
+
        ret = comedi_alloc_subdevices(dev, board->n_subdevs);
        if (ret)
                return ret;
@@ -745,7 +746,7 @@ static int jr3_pci_auto_attach(struct comedi_device *dev,
 
        /* Reset DSP card */
        for (i = 0; i < dev->n_subdevices; i++)
-               writel(0, &devpriv->iobase->channel[i].reset);
+               writel(0, &iobase->channel[i].reset);
 
        ret = comedi_load_firmware(dev, &comedi_to_pci_dev(dev)->dev,
                                   "comedi/jr3pci.idm",
@@ -789,13 +790,10 @@ static void jr3_pci_detach(struct comedi_device *dev)
 {
        struct jr3_pci_dev_private *devpriv = dev->private;
 
-       if (devpriv) {
+       if (devpriv)
                del_timer_sync(&devpriv->timer);
 
-               if (devpriv->iobase)
-                       iounmap(devpriv->iobase);
-       }
-       comedi_pci_disable(dev);
+       comedi_pci_detach(dev);
 }
 
 static struct comedi_driver jr3_pci_driver = {