On 02/02/2026 9:33 am, Leo Yan wrote:
> This series is to fix and refactor CoreSight device registration and
> unregistration, it can be divided into three small parts:
>
> Patches 01-03: Three fixes for memory leak, device reference and mutex
> protection.
> Patches 04-05: Move connection cleanup operations into
> coresight_remove_conns().
> Patches 06-08: Refactor error handling in coresight_register().
>
> This series is verified on Juno board with kmemleak detector.
>
> For kmemleak verifying:
>
> echo clear > /sys/kernel/debug/kmemleak
> insmod coresight modules
> rmmod coresight modules
> echo scan > /sys/kernel/debug/kmemleak
>
> The result shows no memory leak during a cycle of device registration
> and unregistration.
>
> ---
> Changes in v3:
> - Updated patch 01 to use coesight core layer for device index list
> (Suzuki).
> - Link to v2: https://lore.kernel.org/r/20260126-arm_coresight_refactor_dev_register-v2-0-b5a3c0441c15@arm.com
>
> Changes in v2:
> - Refined the commit log in patch 06 (Suzuki).
> - Unified to call coresight_unregister() for error handling (Suzuki).
> - Refactor connection and sysfs group release.
> - Link to v1: https://lore.kernel.org/linux-arm-kernel/20250512154108.23920-1-leo.yan@arm.com/
>
> To: Suzuki K Poulose <suzuki.poulose@arm.com>
> To: Mike Leach <mike.leach@arm.com>
> To: James Clark <james.clark@linaro.org>
> To: Alexander Shishkin <alexander.shishkin@linux.intel.com>
> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> To: Mathieu Poirier <mathieu.poirier@linaro.org>
> To: Mao Jinlong <quic_jinlmao@quicinc.com>
> Cc: coresight@lists.linaro.org
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org
> Signed-off-by: Leo Yan <leo.yan@arm.com>
>
> ---
> Leo Yan (8):
> coresight: Fix memory leak in coresight_alloc_device_name()
> coresight: Get parent device reference after sink ID map allocation
> coresight: Protect unregistration with mutex
> coresight: Refactor output connection sysfs link cleanup
> coresight: Refactor sysfs connection group cleanup
> coresight: Move sink validation into etm_perf_add_symlink_sink()
> coresight: Do not mix success path with failure handling
> coresight: Unify error handling in coresight_register()
>
> drivers/hwtracing/coresight/coresight-catu.c | 4 +-
> drivers/hwtracing/coresight/coresight-core.c | 230 +++++++++++++--------
> drivers/hwtracing/coresight/coresight-ctcu-core.c | 4 +-
> drivers/hwtracing/coresight/coresight-cti-core.c | 19 +-
> drivers/hwtracing/coresight/coresight-dummy.c | 7 +-
> drivers/hwtracing/coresight/coresight-etb10.c | 4 +-
> drivers/hwtracing/coresight/coresight-etm-perf.c | 5 +-
> drivers/hwtracing/coresight/coresight-funnel.c | 4 +-
> drivers/hwtracing/coresight/coresight-platform.c | 2 +-
> drivers/hwtracing/coresight/coresight-priv.h | 3 +-
> drivers/hwtracing/coresight/coresight-replicator.c | 4 +-
> drivers/hwtracing/coresight/coresight-stm.c | 4 +-
> drivers/hwtracing/coresight/coresight-tmc-core.c | 12 +-
> drivers/hwtracing/coresight/coresight-tnoc.c | 4 +-
> drivers/hwtracing/coresight/coresight-tpda.c | 4 +-
> drivers/hwtracing/coresight/coresight-tpdm.c | 4 +-
> drivers/hwtracing/coresight/coresight-tpiu.c | 4 +-
> drivers/hwtracing/coresight/ultrasoc-smb.c | 4 +-
> include/linux/coresight.h | 14 +-
> 19 files changed, 175 insertions(+), 161 deletions(-)
> ---
> base-commit: eebe8dbd8630f51cf70b1f68a440cd3d7f7a914d
> change-id: 20260120-arm_coresight_refactor_dev_register-f16c069db41d
>
> Best regards,
Reviewed-by: James Clark <james.clark@linaro.org>