Commit 1278f7de authored by Yoichi Yuasa's avatar Yoichi Yuasa Committed by Dave Airlie

gma500: Fix mmap frambuffer

It cannot map correctly if page fault begins from a intermediate address.

[The driver prefaults the mapping, so we need to work from the correct
 base address not the faulting address otherwise the map appears offset by
 the fault offset]
Signed-off-by: default avatarYoichi Yuasa <yuasa@linux-mips.org>
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Cc: stable@kernel.org
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent de49442f
...@@ -125,7 +125,7 @@ static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) ...@@ -125,7 +125,7 @@ static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
unsigned long phys_addr = (unsigned long)dev_priv->stolen_base; unsigned long phys_addr = (unsigned long)dev_priv->stolen_base;
page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; page_num = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
address = (unsigned long)vmf->virtual_address; address = (unsigned long)vmf->virtual_address - (vmf->pgoff << PAGE_SHIFT);
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
......
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