nvk: Don't assert when there are no attachments

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24326>

diff --git a/src/nouveau/vulkan/nvk_cmd_draw.c b/src/nouveau/vulkan/nvk_cmd_draw.c
index 4b4fb7a..d81bf7d 100644 (file)
--- a/src/nouveau/vulkan/nvk_cmd_draw.c
+++ b/src/nouveau/vulkan/nvk_cmd_draw.c
@@ -522,7 +522,7 @@ nvk_CmdBeginRendering(VkCommandBuffer commandBuffer,
       P_IMMD(p, NV9097, SET_ZT_SELECT, 0 /* target_count */);
    }
 
-   P_IMMD(p, NV9097, SET_ANTI_ALIAS, ffs(render->samples) - 1);
+   P_IMMD(p, NV9097, SET_ANTI_ALIAS, ffs(MAX2(1, render->samples)) - 1);
 
    if (render->flags & VK_RENDERING_RESUMING_BIT)
       return;