There's an ongoing effort to remove VLAs from the kernel (https://lkml.org/lkml/2018/3/7/621) to eventually turn on -Wvla. The uses in dmatest are bounded by a check to make sure they fit in a u8 so use that as an upper bound.
Signed-off-by: Laura Abbott <[email protected]> --- drivers/dma/dmatest.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/dma/dmatest.c b/drivers/dma/dmatest.c index 80cc2be6483c..dcf787b173e4 100644 --- a/drivers/dma/dmatest.c +++ b/drivers/dma/dmatest.c @@ -556,7 +556,8 @@ static int dmatest_func(void *data) && !(params->iterations && total_tests >= params->iterations)) { struct dma_async_tx_descriptor *tx = NULL; struct dmaengine_unmap_data *um; - dma_addr_t srcs[src_cnt]; + /* total buffer count must fit into u8 */ + dma_addr_t srcs[255]; dma_addr_t *dsts; unsigned int src_off, dst_off, len; @@ -669,7 +670,8 @@ static int dmatest_func(void *data) srcs, src_cnt, len, flags); else if (thread->type == DMA_PQ) { - dma_addr_t dma_pq[dst_cnt]; + /* dst_cnt can't be more than u8 */ + dma_addr_t dma_pq[255]; for (i = 0; i < dst_cnt; i++) dma_pq[i] = dsts[i] + dst_off; -- 2.14.3
