On Thu, 26 Mar 2020, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote:
> Beware dereferencing the NULL pointer prior to checking for its
> existence.
Huh, I don't see the failure mode. Please enlighten me.
BR,
Jani.
>
> Fixes: 419190429cd1 ("drm/i915/hdmi: use struct drm_device based logging")
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Wambui Karuga <wambui.karugax@xxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Cc: "Ville Syrjälä" <ville.syrjala@xxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_hdmi.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index 395dc192baa0..0076abc63851 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -691,7 +691,6 @@ void intel_read_infoframe(struct intel_encoder *encoder,
> union hdmi_infoframe *frame)
> {
> struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
> - struct drm_i915_private *i915 = to_i915(intel_dig_port->base.base.dev);
> u8 buffer[VIDEO_DIP_DATA_SIZE];
> int ret;
>
> @@ -708,13 +707,13 @@ void intel_read_infoframe(struct intel_encoder *encoder,
> /* see comment above for the reason for this offset */
> ret = hdmi_infoframe_unpack(frame, buffer + 1, sizeof(buffer) - 1);
> if (ret) {
> - drm_dbg_kms(&i915->drm,
> + drm_dbg_kms(encoder->base.dev,
> "Failed to unpack infoframe type 0x%02x\n", type);
> return;
> }
>
> if (frame->any.type != type)
> - drm_dbg_kms(&i915->drm,
> + drm_dbg_kms(encoder->base.dev,
> "Found the wrong infoframe type 0x%x (expected 0x%02x)\n",
> frame->any.type, type);
> }
--
Jani Nikula, Intel Open Source Graphics Center
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