The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 9fcf2b3c1c0276650fea537c71b513d27d929b05 Mon Sep 17 00:00:00 2001

From: Stefan Agner stefan@agner.ch Date: Sun, 17 Jun 2018 10:48:22 +0200 Subject: [PATCH] drm/atmel-hlcdc: check stride values in the first plane

The statement always evaluates to true since the struct fields are arrays. This has shown up as a warning when compiling with clang: warning: address of array 'desc->layout.xstride' will always evaluate to 'true' [-Wpointer-bool-conversion]

Check for values in the first plane instead.

Fixes: 1a396789f65a ("drm: add Atmel HLCDC Display Controller support") Cc: stable@vger.kernel.org Signed-off-by: Stefan Agner stefan@agner.ch Signed-off-by: Boris Brezillon boris.brezillon@bootlin.com Link: https://patchwork.freedesktop.org/patch/msgid/20180617084826.31885-1-stefan@...

diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c index e18800ed7cd1..7b8191eae68a 100644 --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c @@ -875,7 +875,7 @@ static int atmel_hlcdc_plane_init_properties(struct atmel_hlcdc_plane *plane, drm_object_attach_property(&plane->base.base, props->alpha, 255);

- if (desc->layout.xstride && desc->layout.pstride) { + if (desc->layout.xstride[0] && desc->layout.pstride[0]) { int ret;

ret = drm_plane_create_rotation_property(&plane->base,