i915g: Document fall-through switch

Fixes warning reported by Coverity.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/gallium/drivers/i915/i915_fpc_emit.c b/src/gallium/drivers/i915/i915_fpc_emit.c
index 683cef04c7e..f4de1f1d7be 100644
--- a/src/gallium/drivers/i915/i915_fpc_emit.c
+++ b/src/gallium/drivers/i915/i915_fpc_emit.c
@@ -200,16 +200,15 @@ uint i915_emit_texld( struct i915_fp_compile *p,
     * a swizzle for no reason below. */
    switch(num_coord) {
       case 0:
-         /* Ignore x */
          ignore |= (0xf << UREG_CHANNEL_X_SHIFT);
+         /* fall-through */
       case 1:
-         /* Ignore y */
          ignore |= (0xf << UREG_CHANNEL_Y_SHIFT);
+         /* fall-through */
       case 2:
-         /* Ignore z */
          ignore |= (0xf << UREG_CHANNEL_Z_SHIFT);
+         /* fall-through */
       case 3:
-         /* Ignore w */
          ignore |= (0xf << UREG_CHANNEL_W_SHIFT);
    }