diff --git a/sys/dev/mpi3mr/mpi3mr_app.c b/sys/dev/mpi3mr/mpi3mr_app.c
--- a/sys/dev/mpi3mr/mpi3mr_app.c
+++ b/sys/dev/mpi3mr/mpi3mr_app.c
@@ -543,6 +543,7 @@
 {
 	U16 i, needed_desc = (dma_buffers->kern_buf_len / MPI3MR_IOCTL_SGE_SIZE);
 	U32 buf_len = dma_buffers->kern_buf_len, copied_len = 0;
+	int error;
 	
 	if (dma_buffers->kern_buf_len % MPI3MR_IOCTL_SGE_SIZE)
 		needed_desc++;
@@ -558,6 +559,7 @@
 	if (!dma_buffers->dma_desc)
 		return -1;
 
+	error = 0;
 	for (i = 0; i < needed_desc; i++, desc_count++) {
 
 		dma_buffers->dma_desc[i].addr = sc->ioctl_sge[desc_count].addr;
@@ -572,12 +574,19 @@
 		memset(dma_buffers->dma_desc[i].addr, 0, sc->ioctl_sge[desc_count].size);
 
 		if (dma_buffers->data_dir == MPI3MR_APP_DDO) {
-			copyin(((U8 *)dma_buffers->user_buf + copied_len),
+			error = copyin(((U8 *)dma_buffers->user_buf + copied_len),
 			       dma_buffers->dma_desc[i].addr,
 			       dma_buffers->dma_desc[i].size);
+			if (error != 0)
+				break;
 			copied_len += dma_buffers->dma_desc[i].size;
 		}
 	}
+	if (error != 0) {
+		printf("%s: DMA copyin error %d\n", __func__, error);
+		free(dma_buffers->dma_desc, M_MPI3MR);
+		return -1;
+	}
 
 	dma_buffers->num_dma_desc = needed_desc;