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linux/drivers/hwtracing
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Johan Hovold 0fca16c559 intel_th: fix device leak on output open() 
commit 95fc36a234 upstream.

Make sure to drop the reference taken when looking up the th device
during output device open() on errors and on close().

Note that a recent commit fixed the leak in a couple of open() error
paths but not all of them, and the reference is still leaking on
successful open().

Fixes: 39f4034693 ("intel_th: Add driver infrastructure for Intel(R) Trace Hub devices")
Fixes: 6d5925b667 ("intel_th: Fix error handling in intel_th_output_open")
Cc: stable@vger.kernel.org	# 4.4: 6d5925b667
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ma Ke <make24@iscas.ac.cn>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20251208153524.68637-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-01-30 10:28:46 +01:00
..
coresight coresight: etm4x: Add context synchronization before enabling trace 2025-12-18 13:54:57 +01:00
intel_th intel_th: fix device leak on output open() 2026-01-30 10:28:46 +01:00
ptt hwtracing: hisi_ptt: Assign parent for event_source device 2024-05-02 11:36:11 +01:00
stm [tree-wide] finally take no_llseek out 2024-09-27 08:18:43 -07:00
Kconfig hwtracing: hisi_ptt: Add trace function support for HiSilicon PCIe Tune and Trace device 2022-09-08 16:26:17 -06:00