radeon: fix bug in realloc code.

This bug was fixed in libdrm ages ago, port to non-kms

diff --git a/src/mesa/drivers/dri/radeon/radeon_cs_legacy.c b/src/mesa/drivers/dri/radeon/radeon_cs_legacy.c
index 45b608a..bf46eb8 100644 (file)
--- a/src/mesa/drivers/dri/radeon/radeon_cs_legacy.c
+++ b/src/mesa/drivers/dri/radeon/radeon_cs_legacy.c
@@ -182,7 +182,7 @@ static int cs_begin(struct radeon_cs_int *cs,
         uint32_t tmp, *ptr;
        int num = (ndw > 0x3FF) ? ndw : 0x3FF;
 
-        tmp = (cs->cdw + 1 + num) & (~num);
+        tmp = (cs->cdw + ndw + 0x3ff) & (~0x3ff);
         ptr = (uint32_t*)realloc(cs->packets, 4 * tmp);
         if (ptr == NULL) {
             return -ENOMEM;