On Tue, Apr 13, 2021 at 12:32:59PM -0500, Jason Ekstrand wrote:
> This fixes the following build error with GCC 11:
>
> In function ‘snb_wm_latency_quirk’,
> inlined from ‘ilk_setup_wm_latency’ at
> drivers/gpu/drm/i915/intel_pm.c:3109:3,
> inlined from ‘intel_init_pm’ at
> drivers/gpu/drm/i915/intel_pm.c:7695:3:
> drivers/gpu/drm/i915/intel_pm.c:3058:9: error: ‘intel_print_wm_latency’
> reading 16 bytes from a region of size 10 [-Werror=stringop-overread]
> 3058 | intel_print_wm_latency(dev_priv, "Primary",
> dev_priv->wm.pri_latency);
> |
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/gpu/drm/i915/intel_pm.c: In function ‘intel_init_pm’:
> drivers/gpu/drm/i915/intel_pm.c:3058:9: note: referencing argument 3 of
> type ‘const u16 *’ {aka ‘const short unsigned int *’}
> drivers/gpu/drm/i915/intel_pm.c:2995:13: note: in a call to function
> ‘intel_print_wm_latency’
> 2995 | static void intel_print_wm_latency(struct drm_i915_private
> *dev_priv,
> | ^~~~~~~~~~~~~~~~~~~~~~
>
> As far as I can tell, we don't actually need 8 elements except on SKL
> and that uses dev_priv->wm.skl_latency which has enough.
>
> Signed-off-by: Jason Ekstrand <ja...@jlekstrand.net>
Reviewed-by: Rodrigo Vivi <rodrigo.v...@intel.com>
and pushed. Thanks for the patch.
> ---
> drivers/gpu/drm/i915/intel_pm.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index 3f6d8b502a619..59498794ac4ea 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -2994,7 +2994,7 @@ int ilk_wm_max_level(const struct drm_i915_private
> *dev_priv)
>
> static void intel_print_wm_latency(struct drm_i915_private *dev_priv,
> const char *name,
> - const u16 wm[8])
> + const u16 *wm)
> {
> int level, max_level = ilk_wm_max_level(dev_priv);
>
> --
> 2.31.1
>
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