dma: Cope with dma being NULL in destructor

On certain error paths, @dma will be NULL. This makes the destructor
cope with it.

Signed-off-by: Felipe Franciosi <felipe@nutanix.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/dma.c b/lib/dma.c
index 17e34e8..eb4b9d4 100644
--- a/lib/dma.c
+++ b/lib/dma.c
@@ -137,6 +137,10 @@ dma_controller_remove_regions(lm_ctx_t *ctx, dma_controller_t *dma)
 void
 dma_controller_destroy(lm_ctx_t *lm_ctx, dma_controller_t *dma)
 {
+    if (dma == NULL) {
+        return;
+    }
+
     dma_controller_remove_regions(lm_ctx, dma);
     free(dma);
 }