On Thu, 15 Feb 2018, Mika Kahola <mika.kahola@xxxxxxxxx> wrote:
> On Wed, 2018-02-14 at 19:38 +0200, Jani Nikula wrote:
>> Turns out -1 >= ARRAY_SIZE() is always true. Move the bounds check
>> where
>> we know pipe >= 0 and next to the array indexing where it makes most
>> sense.
>>
>> Fixes: 9965db26ac05 ("drm/i915: Check for fused or unused pipes")
>> Fixes: 0b7029b7e43f ("drm/i915: Check for fused or unused pipes")
>> Cc: <stable@xxxxxxxxxxxxxxx> # v4.10+
>> Cc: Mika Kahola <mika.kahola@xxxxxxxxx>
>> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
>> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
>> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
>> Cc: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
>
> Reviewed-by: Mika Kahola <mika.kahola@xxxxxxxxx>
Pushed to dinq, thanks for the reviews.
BR,
Jani.
>
>> Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
>> ---
>> drivers/gpu/drm/i915/intel_audio.c | 6 +++---
>> 1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_audio.c
>> b/drivers/gpu/drm/i915/intel_audio.c
>> index ff455c724775..709d6ca68074 100644
>> --- a/drivers/gpu/drm/i915/intel_audio.c
>> +++ b/drivers/gpu/drm/i915/intel_audio.c
>> @@ -779,11 +779,11 @@ static struct intel_encoder
>> *get_saved_enc(struct drm_i915_private *dev_priv,
>> {
>> struct intel_encoder *encoder;
>>
>> - if (WARN_ON(pipe >= ARRAY_SIZE(dev_priv->av_enc_map)))
>> - return NULL;
>> -
>> /* MST */
>> if (pipe >= 0) {
>> + if (WARN_ON(pipe >= ARRAY_SIZE(dev_priv-
>> >av_enc_map)))
>> + return NULL;
>> +
>> encoder = dev_priv->av_enc_map[pipe];
>> /*
>> * when bootup, audio driver may not know it is
--
Jani Nikula, Intel Open Source Technology Center