* [PATCH] gma500: Fix mmap frambuffer
@ 2012-03-15 12:28 Yoichi Yuasa
2012-03-15 14:47 ` Alan Cox
0 siblings, 1 reply; 2+ messages in thread
From: Yoichi Yuasa @ 2012-03-15 12:28 UTC (permalink / raw)
To: alan; +Cc: yuasa, linux-kernel, linux-fbdev
It cannot map correctly if page fault begins from a intermediate address.
Signed-off-by: Yoichi Yuasa <yuasa@linux-mips.org>
---
drivers/gpu/drm/gma500/framebuffer.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index be61673..5154493 100644
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -158,7 +158,7 @@ static int psbfb_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
unsigned long phys_addr = (unsigned long)dev_priv->stolen_base;
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);
--
1.7.0.4
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2012-03-15 12:28 [PATCH] gma500: Fix mmap frambuffer Yoichi Yuasa
2012-03-15 14:47 ` Alan Cox
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