On Mon, Jul 29, 2019 at 05:52:21PM -0500, Gustavo A. R. Silva wrote:
> Mark switch cases where we are expecting to fall through.
>
> This patch fixes the following warning (Building: arm):
>
> drivers/dma/imx-dma.c: In function ‘imxdma_xfer_desc’:
> drivers/dma/imx-dma.c:542:6: warning: this statement may fall through [-Wimplicit-fallthrough=]
> if (slot == IMX_DMA_2D_SLOT_A) {
> ^
> drivers/dma/imx-dma.c:559:2: note: here
> case IMXDMA_DESC_MEMCPY:
> ^~~~
>
> Notice that, in this particular case, the code comment is
> modified in accordance with what GCC is expecting to find.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
-Kees
> ---
> drivers/dma/imx-dma.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
> index 00a089e24150..5c0fb3134825 100644
> --- a/drivers/dma/imx-dma.c
> +++ b/drivers/dma/imx-dma.c
> @@ -556,6 +556,7 @@ static int imxdma_xfer_desc(struct imxdma_desc *d)
> * We fall-through here intentionally, since a 2D transfer is
> * similar to MEMCPY just adding the 2D slot configuration.
> */
> + /* Fall through */
> case IMXDMA_DESC_MEMCPY:
> imx_dmav1_writel(imxdma, d->src, DMA_SAR(imxdmac->channel));
> imx_dmav1_writel(imxdma, d->dest, DMA_DAR(imxdmac->channel));
> --
> 2.22.0
>
--
Kees Cook
