asahi: Fix segfault with null drawbuffer

Fixes fbo-drawbuffers-none piglit.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20569>

diff --git a/src/gallium/drivers/asahi/agx_batch.c b/src/gallium/drivers/asahi/agx_batch.c
index 600b733..a786451 100644 (file)
--- a/src/gallium/drivers/asahi/agx_batch.c
+++ b/src/gallium/drivers/asahi/agx_batch.c
@@ -70,7 +70,8 @@ agx_batch_init(struct agx_context *ctx,
    }
 
    for (unsigned i = 0; i < key->nr_cbufs; ++i) {
-      agx_batch_writes(batch, agx_resource(key->cbufs[i]->texture));
+      if (key->cbufs[i])
+         agx_batch_writes(batch, agx_resource(key->cbufs[i]->texture));
    }
 
    unsigned batch_idx = agx_batch_idx(batch);