linux-kernel - [PATCH v2 0/4] drm/msm/adreno: fix runtime PM imbalance at unbind

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-Id: <20230303164807.13124-1-johan+linaro@kernel.org>
Date:   Fri,  3 Mar 2023 17:48:03 +0100
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Bjorn Andersson <andersson@...nel.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH v2 0/4] drm/msm/adreno: fix runtime PM imbalance at unbind

As reported by Bjorn, we can end up with an unbalanced runtime PM
disable count if unbind() is called before the DRM device is opened
(e.g. if component bind fails due to the panel driver not having been
loaded yet).

As runtime PM must currently stay disabled until the firmware has been
loaded, fix this by making the runtime PM disable call at unbind()
conditional.

The rest of the series fixes further imbalances in the load_gpu() error
paths and removes a bogus pm_runtime_set_active() call. Included is also
a related indentation cleanup.

Johan


Changes in v2
 - fix the runtime PM imbalance in the gpu load error paths (new)

 - drop the patch removing the pm_runtime_disable() from
   adreno_gpu_cleanup() as this function can currently still be called
   with runtime PM enabled if suspending the scheduler in
   adreno_system_suspend() at unbind fails


Johan Hovold (4):
  drm/msm/adreno: fix runtime PM imbalance at unbind
  drm/msm/adreno: fix runtime PM imbalance at gpu load
  drm/msm/adreno: drop bogus pm_runtime_set_active()
  drm/msm/adreno: clean up component ops indentation

 drivers/gpu/drm/msm/adreno/adreno_device.c | 26 +++++++++++++---------
 1 file changed, 16 insertions(+), 10 deletions(-)

-- 
2.39.2