linux-kernel - [PATCH v5 0/3] coresight: Fix possible deadlock in coresight_panic

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Message-Id: <20250925150342.1845615-1-sean.anderson@linux.dev>
Date: Thu, 25 Sep 2025 11:03:39 -0400
From: Sean Anderson <sean.anderson@...ux.dev>
To: Suzuki K Poulose <suzuki.poulose@....com>,
	coresight@...ts.linaro.org,
	linux-arm-kernel@...ts.infradead.org
Cc: Leo Yan <leo.yan@....com>,
	Yeoreum Yun <yeoreum.yun@....com>,
	Linu Cherian <lcherian@...vell.com>,
	Mike Leach <mike.leach@...aro.org>,
	linux-kernel@...r.kernel.org,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	James Clark <james.clark@...aro.org>,
	Sean Anderson <sean.anderson@...ux.dev>
Subject: [PATCH v5 0/3] coresight: Fix possible deadlock in coresight_panic_cb

This time with the notifier in csdev.

Changes in v5:
- Split reordering of coresight_device_release into a separate patch
- Check csdev mode before calling sync()

Changes in v4:
- Fix fwnode leak in coresight_register error path
- Move the panic notifier into csdev and restore the panic sync API

Changes in v3:
- Rewrite patch to remove the panic sync API entirely

Changes in v2:
- Add a comment describing csdev_lock/list
- Consolidate list removal in coresight_device_release

Sean Anderson (3):
  coresight: Fix fwnode leak in coresight_register error path
  coresight: Reorder coresight_device_release to match
    coresight_register
  coresight: Fix possible deadlock in coresight_panic_cb

 drivers/hwtracing/coresight/coresight-core.c | 71 ++++++++------------
 include/linux/coresight.h                    |  2 +
 2 files changed, 30 insertions(+), 43 deletions(-)

-- 
2.35.1.1320.gc452695387.dirty