From: Tzung-Bi Shih <tzungbi@google.com>
To: broonie@kernel.org, airlied@linux.ie, daniel@ffwll.ch
Cc: alsa-devel@alsa-project.org, cychiang@google.com,
tzungbi@google.com, dri-devel@lists.freedesktop.org,
ck.hu@mediatek.com, linux-mediatek@lists.infradead.org,
p.zabel@pengutronix.de, matthias.bgg@gmail.com,
dgreid@google.com, linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 0/2] ASoC hdmi-codec: fix HDMI jack reporting
Date: Mon, 17 Feb 2020 11:16:51 +0800 [thread overview]
Message-ID: <20200217031653.52345-1-tzungbi@google.com> (raw)
With proper unbinding audio components and inserting the HDMI external
display, kernel crashes as the following messages:
Unable to handle kernel NULL pointer dereference at virtual address ...
[snip]
Call trace:
plugged_cb+0x1c/0x74
mtk_hdmi_update_plugged_status+0x48/0x6c
hdmi_conn_detect+0x1c/0x28
drm_helper_probe_detect+0x110/0x170
drm_helper_probe_single_connector_modes+0xd4/0x608
drm_mode_getconnector+0x1e8/0x418
The 1st patch fixes the crash by notifying hdmi-codec's consumers to not
report jack status anymore when component removing.
The 2nd patch fixes race condition in mediatek/mtk_hdmi.c.
Changes from v1:
(https://patchwork.kernel.org/patch/11379979/)
- added the 1st patch
- use mutex to protect plugged_cb and codec_dev in 2nd patch
Tzung-Bi Shih (2):
ASoC: hdmi-codec: set plugged_cb to NULL when component removing
drm/mediatek: fix race condition for HDMI jack status reporting
drivers/gpu/drm/mediatek/mtk_hdmi.c | 11 ++++++++++-
sound/soc/codecs/hdmi-codec.c | 10 ++++++++++
2 files changed, 20 insertions(+), 1 deletion(-)
--
2.25.0.265.gbab2e86ba0-goog
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next reply other threads:[~2020-02-17 3:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-17 3:16 Tzung-Bi Shih [this message]
2020-02-17 3:16 ` [PATCH v2 1/2] ASoC: hdmi-codec: set plugged_cb to NULL when component removing Tzung-Bi Shih
2020-02-17 22:04 ` Applied "ASoC: hdmi-codec: set plugged_cb to NULL when component removing" to the asoc tree Mark Brown
2020-02-17 3:16 ` [PATCH v2 2/2] drm/mediatek: fix race condition for HDMI jack status reporting Tzung-Bi Shih
2020-02-17 3:44 ` CK Hu
2020-02-17 3:55 ` Tzung-Bi Shih
2020-02-17 4:49 ` CK Hu
2020-02-17 22:03 ` Applied "drm/mediatek: fix race condition for HDMI jack status reporting" to the asoc tree Mark Brown
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