1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 8358d73ae468..856c094a35e0 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -2131,6 +2131,9 @@ static uint32_t ilk_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel,
 {
         uint64_t ret;
 
+        if (WARN(latency == 0, "Latency value missing\n"))
+                return UINT_MAX;
+
         ret = (uint64_t) pixel_rate * bytes_per_pixel * latency;
         ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2;
 
@@ -2143,6 +2146,9 @@ static uint32_t ilk_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
 {
         uint32_t ret;
 
+        if (WARN(latency == 0, "Latency value missing\n"))
+                return UINT_MAX;
+
         ret = (latency * pixel_rate) / (pipe_htotal * 10000);
         ret = (ret + 1) * horiz_pixels * bytes_per_pixel;
         ret = DIV_ROUND_UP(ret, 64) + 2;