linux-next: build warning after merge of the kspp tree

Stephen Rothwell
2021-08-30T08:44:34Z

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Hi all,

After merging the kspp tree, today's linux-next build (powerpc
allyesconfig) produced this warning:

drivers/gpu/drm/kmb/kmb_plane.c:135:20: warning: array subscript 3 is above array bounds of 'struct layer_status[1]' [-Warray-bounds]
135 | kmb->plane_status[plane_id].ctrl = LCD_CTRL_GL2_ENABLE;
| ~~~~~~~~~~~~~~~~~^~~~~~~~~~
In file included from drivers/gpu/drm/kmb/kmb_plane.c:17:
drivers/gpu/drm/kmb/kmb_drv.h:48:23: note: while referencing 'plane_status'
48 | struct layer_status plane_status[KMB_MAX_PLANES];
| ^~~~~~~~~~~~
drivers/gpu/drm/kmb/kmb_plane.c:132:20: warning: array subscript 2 is above array bounds of 'struct layer_status[1]' [-Warray-bounds]
132 | kmb->plane_status[plane_id].ctrl = LCD_CTRL_GL1_ENABLE;
| ~~~~~~~~~~~~~~~~~^~~~~~~~~~
In file included from drivers/gpu/drm/kmb/kmb_plane.c:17:
drivers/gpu/drm/kmb/kmb_drv.h:48:23: note: while referencing 'plane_status'
48 | struct layer_status plane_status[KMB_MAX_PLANES];
| ^~~~~~~~~~~~
drivers/gpu/drm/kmb/kmb_plane.c:129:20: warning: array subscript 1 is above array bounds of 'struct layer_status[1]' [-Warray-bounds]
129 | kmb->plane_status[plane_id].ctrl = LCD_CTRL_VL2_ENABLE;
| ~~~~~~~~~~~~~~~~~^~~~~~~~~~
In file included from drivers/gpu/drm/kmb/kmb_plane.c:17:
drivers/gpu/drm/kmb/kmb_drv.h:48:23: note: while referencing 'plane_status'
48 | struct layer_status plane_status[KMB_MAX_PLANES];
| ^~~~~~~~~~~~

Exposed by commit

656256c0d67c ("Makefile: Enable -Warray-bounds")

Introduced by commit

7f7b96a8a0a1 ("drm/kmb: Add support for KeemBay Display")

from v5.11-rc1.