On to, 2015-09-17 at 14:20 +0100, Damien Lespiau wrote:
> Not the first time! not the last time?
>
> There is a possibility to use gcc 5's -Wbool-compare to try and compare
> (reg) in those macros to a constant and gcc will warn that the
> comparison between a boolean expression and a constant is always either
> true or false. Maybe.
>
> Cc: Imre Deak <imre.deak@xxxxxxxxx>
> Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>
Errrr. Thanks for catching it:
Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_ddi.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index 4823184..5b600bf 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -2882,7 +2882,7 @@ static bool bxt_ddi_pll_get_hw_state(struct drm_i915_private *dev_priv,
> * here just read out lanes 0/1 and output a note if lanes 2/3 differ.
> */
> hw_state->pcsdw12 = I915_READ(BXT_PORT_PCS_DW12_LN01(port));
> - if (I915_READ(BXT_PORT_PCS_DW12_LN23(port) != hw_state->pcsdw12))
> + if (I915_READ(BXT_PORT_PCS_DW12_LN23(port)) != hw_state->pcsdw12)
> DRM_DEBUG_DRIVER("lane stagger config different for lane 01 (%08x) and 23 (%08x)\n",
> hw_state->pcsdw12,
> I915_READ(BXT_PORT_PCS_DW12_LN23(port)));
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