Thread (2 messages) 2 messages, 2 authors, 2012-03-15
STALE5310d

[PATCH] gma500: Fix mmap frambuffer

From: Yoichi Yuasa <hidden>
Date: 2012-03-15 12:28:31
Also in: lkml
Subsystem: drm drivers, drm drivers and misc gpu patches, drm drivers for gma500 (poulsbo, moorestown and derivative chipsets), the rest · Maintainers: David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Patrik Jakobsson, Linus Torvalds

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

Signed-off-by: Yoichi Yuasa <redacted>
---
 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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