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Misc: phantom, take care of pci posting 

phantom, take care of pci posting

thanks to akpm for pointing this out

Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiri Slaby 2007-05-23 13:57:59 -07:00 committed by Linus Torvalds
parent c15395c0db
commit c8511f9490
1 changed files with 10 additions and 1 deletions
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11
drivers/misc/phantom.c
View File

@ -60,8 +60,11 @@ static int phantom_status(struct phantom_device *dev, unsigned long newstat)
atomic_set(&dev->counter, 0);
iowrite32(PHN_CTL_IRQ, dev->iaddr + PHN_CONTROL);
iowrite32(0x43, dev->caddr + PHN_IRQCTL);
} else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING))
ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
} else if ((dev->status & PHB_RUNNING) && !(newstat & PHB_RUNNING)) {
iowrite32(0, dev->caddr + PHN_IRQCTL);
ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
}
dev->status = newstat;
@ -102,6 +105,7 @@ static long phantom_ioctl(struct file *file, unsigned int cmd,
pr_debug("phantom: writing %x to %u\n", r.value, r.reg);
iowrite32(r.value, dev->iaddr + r.reg);
ioread32(dev->iaddr); /* PCI posting */
if (r.reg == PHN_CONTROL && !(r.value & PHN_CTL_IRQ))
phantom_status(dev, dev->status & ~PHB_RUNNING);
@ -116,6 +120,7 @@ static long phantom_ioctl(struct file *file, unsigned int cmd,
for (i = 0; i < min(rs.count, 8U); i++)
if ((1 << i) & rs.mask)
iowrite32(rs.values[i], dev->oaddr + i);
ioread32(dev->iaddr); /* PCI posting */
spin_unlock(&dev->ioctl_lock);
break;
case PHN_GET_REG:
@ -221,6 +226,7 @@ static irqreturn_t phantom_isr(int irq, void *data)
iowrite32(0, dev->iaddr);
iowrite32(0xc0, dev->iaddr);
ioread32(dev->iaddr); /* PCI posting */
atomic_inc(&dev->counter);
wake_up_interruptible(&dev->wait);
@ -297,6 +303,7 @@ static int __devinit phantom_probe(struct pci_dev *pdev,
pht->cdev.owner = THIS_MODULE;
iowrite32(0, pht->caddr + PHN_IRQCTL);
ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
retval = request_irq(pdev->irq, phantom_isr,
IRQF_SHARED | IRQF_DISABLED, "phantom", pht);
if (retval) {
@ -347,6 +354,7 @@ static void __devexit phantom_remove(struct pci_dev *pdev)
cdev_del(&pht->cdev);
iowrite32(0, pht->caddr + PHN_IRQCTL);
ioread32(pht->caddr + PHN_IRQCTL); /* PCI posting */
free_irq(pdev->irq, pht);
pci_iounmap(pdev, pht->oaddr);
@ -368,6 +376,7 @@ static int phantom_suspend(struct pci_dev *pdev, pm_message_t state)
struct phantom_device *dev = pci_get_drvdata(pdev);
iowrite32(0, dev->caddr + PHN_IRQCTL);
ioread32(dev->caddr + PHN_IRQCTL); /* PCI posting */
return 0;
}