1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/char/drm/radeon_cp.c b/drivers/char/drm/radeon_cp.c
index 5ed965688293..c1850ecac302 100644
--- a/drivers/char/drm/radeon_cp.c
+++ b/drivers/char/drm/radeon_cp.c
@@ -1560,8 +1560,8 @@ static int radeon_do_init_cp(drm_device_t * dev, drm_radeon_init_t * init)
                 if (dev_priv->flags & RADEON_IS_AGP) {
                         base = dev->agp->base;
                         /* Check if valid */
-                        if ((base + dev_priv->gart_size) > dev_priv->fb_location &&
-                            base < (dev_priv->fb_location + dev_priv->fb_size)) {
+                        if ((base + dev_priv->gart_size - 1) >= dev_priv->fb_location &&
+                            base < (dev_priv->fb_location + dev_priv->fb_size - 1)) {
                                 DRM_INFO("Can't use AGP base @0x%08lx, won't fit\n",
                                          dev->agp->base);
                                 base = 0;
@@ -1571,8 +1571,8 @@ static int radeon_do_init_cp(drm_device_t * dev, drm_radeon_init_t * init)
                 /* If not or if AGP is at 0 (Macs), try to put it elsewhere */
                 if (base == 0) {
                         base = dev_priv->fb_location + dev_priv->fb_size;
-                        if (((base + dev_priv->gart_size) & 0xfffffffful)
-                            < base)
+                        if (base < dev_priv->fb_location ||
+                            ((base + dev_priv->gart_size) & 0xfffffffful) < base)
                                 base = dev_priv->fb_location
                                         - dev_priv->gart_size;
                 }