On Fri, 26 Jun 2020 13:34:01 +0300
Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:
> The problem is that the iterator is already at the list head so the
> list_for_each_entry_from() loop is a no-op and we don't call the
> the iter->funcs->post_disable() functions. This should be
> list_for_each_entry() instead.
>
> Fixes: 033bfe7538a1 ("drm/vc4: dsi: Fix bridge chain handling")
> Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/vc4/vc4_dsi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
> index eaf276978ee7..f92d0e92fa72 100644
> --- a/drivers/gpu/drm/vc4/vc4_dsi.c
> +++ b/drivers/gpu/drm/vc4/vc4_dsi.c
> @@ -754,7 +754,7 @@ static void vc4_dsi_encoder_disable(struct drm_encoder *encoder)
>
> vc4_dsi_ulps(dsi, true);
>
> - list_for_each_entry_from(iter, &dsi->bridge_chain, chain_node) {
> + list_for_each_entry(iter, &dsi->bridge_chain, chain_node) {
> if (iter->funcs->post_disable)
> iter->funcs->post_disable(iter);
> }
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