linux-kernel - [PATCH v2 0/2] drm/msm: Remove spurious IRQF

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Date:   Tue,  1 Feb 2022 17:47:31 +0000
From:   Daniel Thompson <daniel.thompson@...aro.org>
To:     Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc:     Daniel Thompson <daniel.thompson@...aro.org>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/2] drm/msm: Remove spurious IRQF_ONESHOT flags from dsi & hdmi

This series corrects incorrect calls to
request_irq(..., IRQF_ONESHOT, ...). These anomalies are harmless on
regular kernels but cause odd behaviour on threadirq kernels and
break entirely on PREEMPT_RT kernels

I'm pretty certain these problems would also provoke lockdep splats on
kernels with CONFIG_PROVE_RAW_LOCK_NESTING enabled (because that is
intended to find code that breaks entirely on PREEMPT_RT kernels ;-) ).

Finally, and just in case anybody asks, yes! I did use coccinelle to do
a quick scan for similar issues. I didn't find any other instances in
drivers/drm/ .

Changes in v2:
 - Split into separate patches (Dmitry B)

Daniel Thompson (2):
  drm/msm/dsi: Remove spurious IRQF_ONESHOT flag
  drm/msm/hdmi: Remove spurious IRQF_ONESHOT flag

 drivers/gpu/drm/msm/dsi/dsi_host.c | 2 +-
 drivers/gpu/drm/msm/hdmi/hdmi.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

base-commit: 26291c54e111ff6ba87a164d85d4a4e134b7315c
--
2.34.1