drm: Unify radeon offset checking.
Replace r300_check_offset() with generic radeon_check_offset(), which doesn't
reject valid offsets when the framebuffer area is at the very end of the card's
32 bit address space. Make radeon_check_and_fixup_offset() use
radeon_check_offset() as well.
This fixes https://bugs.freedesktop.org/show_bug.cgi?id=7697 .
diff --git a/drivers/char/drm/radeon_drv.h b/drivers/char/drm/radeon_drv.h
index f45cd7f..8b105f1 100644
--- a/drivers/char/drm/radeon_drv.h
+++ b/drivers/char/drm/radeon_drv.h
@@ -303,6 +303,21 @@
extern drm_ioctl_desc_t radeon_ioctls[];
extern int radeon_max_ioctl;
+/* Check whether the given hardware address is inside the framebuffer or the
+ * GART area.
+ */
+static __inline__ int radeon_check_offset(drm_radeon_private_t *dev_priv,
+ u64 off)
+{
+ u32 fb_start = dev_priv->fb_location;
+ u32 fb_end = fb_start + dev_priv->fb_size - 1;
+ u32 gart_start = dev_priv->gart_vm_start;
+ u32 gart_end = gart_start + dev_priv->gart_size - 1;
+
+ return ((off >= fb_start && off <= fb_end) ||
+ (off >= gart_start && off <= gart_end));
+}
+
/* radeon_cp.c */
extern int radeon_cp_init(DRM_IOCTL_ARGS);
extern int radeon_cp_start(DRM_IOCTL_ARGS);