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ethercat
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Fixed page fault handler.

This commit is contained in:
Florian Pose 2008-10-21 09:26:19 +00:00
parent a5626fc116
commit 59f197a6f0
1 changed files with 11 additions and 8 deletions
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19
master/cdev.c
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@ -2612,21 +2612,24 @@ static int eccdev_vma_fault(
struct vm_fault *vmf /**< Fault data. */
)
{
struct page *page;
unsigned long offset = vmf->pgoff << PAGE_SHIFT;
ec_cdev_priv_t *priv = (ec_cdev_priv_t *) vma->vm_private_data;
struct page *page;
if (vmf->pgoff >= priv->process_data_size)
if (offset >= priv->process_data_size)
return VM_FAULT_SIGBUS;
page = vmalloc_to_page(priv->process_data + vmf->pgoff);
if (priv->cdev->master->debug_level)
EC_DBG("Vma fault, address = %p, offset = %lu, page = %p\n",
vmf->virtual_address, vmf->pgoff, page);
page = vmalloc_to_page(priv->process_data + offset);
if (!page)
return VM_FAULT_SIGBUS;
get_page(page);
vmf->page = page;
vmf->flags = 0;
if (priv->cdev->master->debug_level)
EC_DBG("Vma fault, virtual_address = %p, offset = %lu, page = %p\n",
vmf->virtual_address, offset, page);
return 0;
}