drm/radeon: off by one in check_reg() functions

This off by one range check was copy and pasted a couple places.
It's not really harmful, but we should fix it anyway.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/evergreen_cs.c b/drivers/gpu/drm/radeon/evergreen_cs.c
index 189e865..a134790 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen_cs.c
+++ b/drivers/gpu/drm/radeon/evergreen_cs.c
@@ -428,7 +428,7 @@ static inline int evergreen_cs_check_reg(struct radeon_cs_parser *p, u32 reg, u3
                last_reg = ARRAY_SIZE(evergreen_reg_safe_bm);
 
        i = (reg >> 7);
-       if (i > last_reg) {
+       if (i >= last_reg) {
                dev_warn(p->dev, "forbidden register 0x%08x at %d\n", reg, idx);
                return -EINVAL;
        }

diff --git a/drivers/gpu/drm/radeon/r600_cs.c b/drivers/gpu/drm/radeon/r600_cs.c
index db8ef19..cf83aa0 100644 (file)
--- a/drivers/gpu/drm/radeon/r600_cs.c
+++ b/drivers/gpu/drm/radeon/r600_cs.c
@@ -915,12 +915,11 @@ static inline int r600_cs_check_reg(struct radeon_cs_parser *p, u32 reg, u32 idx
 {
        struct r600_cs_track *track = (struct r600_cs_track *)p->track;
        struct radeon_cs_reloc *reloc;
-       u32 last_reg = ARRAY_SIZE(r600_reg_safe_bm);
        u32 m, i, tmp, *ib;
        int r;
 
        i = (reg >> 7);
-       if (i > last_reg) {
+       if (i >= ARRAY_SIZE(r600_reg_safe_bm)) {
                dev_warn(p->dev, "forbidden register 0x%08x at %d\n", reg, idx);
                return -EINVAL;
        }