gallium/util: make sure cache line size is not zero

[mesa.git] / src / gallium / auxiliary / util / u_cpu_detect.c

diff --git a/src/gallium/auxiliary/util/u_cpu_detect.c b/src/gallium/auxiliary/util/u_cpu_detect.c
index 28197f4a9d8354cd834c9314fff7a10ece2f026e..23ab46c54bc628653f2cd960a9736c66a3611066 100644 (file)
--- a/src/gallium/auxiliary/util/u_cpu_detect.c
+++ b/src/gallium/auxiliary/util/u_cpu_detect.c
@@ -409,8 +409,12 @@ util_cpu_detect(void)
       }
 
       if (regs[0] >= 0x80000006) {
+         /* should we really do this if the clflush size above worked? */
+         unsigned int cacheline;
          cpuid(0x80000006, regs2);
-         util_cpu_caps.cacheline = regs2[2] & 0xFF;
+         cacheline = regs2[2] & 0xFF;
+         if (cacheline > 0)
+            util_cpu_caps.cacheline = cacheline;
       }
 
       if (!util_cpu_caps.has_sse) {