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staging: comedi: gsc_hpdi: remove devpriv->hw_dev 

The `hw_dev` member of `struct hpdi_private` is used to point to the
`struct pci_dev`.  This is redundant as the `struct comedi_device`
already has a pointer to the `struct device` within the `struct pci_dev`
and there is a convenient inline function, `comedi_to_pci_dev(dev)` that
returns a pointer to the `struct pci_dev`.

Remove the redundant `hw_dev` member and use alternate ways to get at
the `struct pci_dev`.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2012-11-01 16:28:28 +00:00 committed by Greg Kroah-Hartman
parent 4e95df1f48
commit fd67ad4433
1 changed files with 18 additions and 20 deletions
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38
drivers/staging/comedi/drivers/gsc_hpdi.c
View File

@ -213,8 +213,6 @@ static inline struct hpdi_board *board(const struct comedi_device *dev)
}
struct hpdi_private {
struct pci_dev *hw_dev; /* pointer to board's pci_dev struct */
/* base addresses (physical) */
resource_size_t plx9080_phys_iobase;
resource_size_t hpdi_phys_iobase;
@ -502,7 +500,6 @@ static int __devinit hpdi_auto_attach(struct comedi_device *dev,
if (!devpriv)
return -ENOMEM;
dev->private = devpriv;
devpriv->hw_dev = pcidev;
if (comedi_pci_enable(pcidev, dev->driver->driver_name)) {
dev_warn(dev->class_dev,
@ -550,18 +547,17 @@ static int __devinit hpdi_auto_attach(struct comedi_device *dev,
/* allocate pci dma buffers */
for (i = 0; i < NUM_DMA_BUFFERS; i++) {
devpriv->dio_buffer[i] =
pci_alloc_consistent(devpriv->hw_dev, DMA_BUFFER_SIZE,
pci_alloc_consistent(pcidev, DMA_BUFFER_SIZE,
&devpriv->dio_buffer_phys_addr[i]);
DEBUG_PRINT("dio_buffer at virt 0x%p, phys 0x%lx\n",
devpriv->dio_buffer[i],
(unsigned long)devpriv->dio_buffer_phys_addr[i]);
}
/* allocate dma descriptors */
devpriv->dma_desc = pci_alloc_consistent(devpriv->hw_dev,
sizeof(struct plx_dma_desc) *
NUM_DMA_DESCRIPTORS,
&devpriv->
dma_desc_phys_addr);
devpriv->dma_desc = pci_alloc_consistent(pcidev,
sizeof(struct plx_dma_desc) *
NUM_DMA_DESCRIPTORS,
&devpriv->dma_desc_phys_addr);
if (devpriv->dma_desc_phys_addr & 0xf) {
dev_warn(dev->class_dev,
" dma descriptors not quad-word aligned (bug)\n");
@ -581,12 +577,13 @@ static int __devinit hpdi_auto_attach(struct comedi_device *dev,
static void hpdi_detach(struct comedi_device *dev)
{
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
struct hpdi_private *devpriv = dev->private;
unsigned int i;
if (dev->irq)
free_irq(dev->irq, dev);
if (devpriv && devpriv->hw_dev) {
if (devpriv) {
if (devpriv->plx9080_iobase) {
disable_plx_interrupts(dev);
iounmap(devpriv->plx9080_iobase);
@ -596,20 +593,21 @@ static void hpdi_detach(struct comedi_device *dev)
/* free pci dma buffers */
for (i = 0; i < NUM_DMA_BUFFERS; i++) {
if (devpriv->dio_buffer[i])
pci_free_consistent(devpriv->hw_dev,
DMA_BUFFER_SIZE,
devpriv->dio_buffer[i],
devpriv->dio_buffer_phys_addr[i]);
pci_free_consistent(pcidev,
DMA_BUFFER_SIZE,
devpriv->dio_buffer[i],
devpriv->
dio_buffer_phys_addr[i]);
}
/* free dma descriptors */
if (devpriv->dma_desc)
pci_free_consistent(devpriv->hw_dev,
sizeof(struct plx_dma_desc) *
NUM_DMA_DESCRIPTORS,
devpriv->dma_desc,
devpriv-> dma_desc_phys_addr);
pci_free_consistent(pcidev,
sizeof(struct plx_dma_desc) *
NUM_DMA_DESCRIPTORS,
devpriv->dma_desc,
devpriv->dma_desc_phys_addr);
if (devpriv->hpdi_phys_iobase)
comedi_pci_disable(devpriv->hw_dev);
comedi_pci_disable(pcidev);
}
}