linux-kernel - Re: [PATCH] drm/i915: convert to new logging macros based on struct intel_engine

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 13 Jan 2020 11:17:52 +0000
From:   Chris Wilson <chris@...is-wilson.co.uk>
To:     Wambui Karuga <wambui.karugax@...il.com>, airlied@...ux.ie,
        daniel@...ll.ch, jani.nikula@...ux.intel.com,
        joonas.lahtinen@...ux.intel.com, rodrigo.vivi@...el.com
Cc:     sean@...rly.run, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/i915: convert to new logging macros based on struct
 intel_engine_cs.

Quoting Wambui Karuga (2020-01-13 11:10:25)
> fn(...) {
> ...
> struct intel_engine_cs *E = ...;
> +struct drm_i915_private *dev_priv = E->i915;

No new dev_priv.

There should be no reason for drm_dbg here, as the rest of the debug is
behind ENGINE_TRACE and so the vestigial debug should be moved over, or
deleted as not being useful.

The error messages look unhelpful.

>                 if ((batch_end - cmd) < length) {
> -                       DRM_DEBUG("CMD: Command length exceeds batch length: 0x%08X length=%u batchlen=%td\n",
> -                                 *cmd,
> -                                 length,
> -                                 batch_end - cmd);
> +                       drm_dbg(&dev_priv->drm,
> +                               "CMD: Command length exceeds batch length: 0x%08X length=%u batchlen=%td\n",

No. This is not driver debug. If anything this should be pr_debug, or
some over user centric channel.
-Chris