Hi Greg
Please find this pull request for CoreSight subsystem targeting v7.3.
Almost all of them are fixes to the existing code, along with a MAINTAINERS
update for HiSilicon PTT driver.
Kindly pull
Suzuki
The following changes since commit 8cdeaa50eae8dad34885515f62559ee83e7e8dda:
Linux 7.2-rc2 (2026-07-05 14:44:06 -1000)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git tags/coresight-next-v7.3
for you to fetch changes up to 9e3604d7369cfc0110100eb1a0acab1865ee2d18:
coresight: etm4x: remove redundant fields in etmv4_save_state (2026-08-07 10:45:11 +0100)
----------------------------------------------------------------
coresight: Updates for Linux v7.3
This is relatively smaller update for CoreSight/hwtracing subsystem updates.
- MAINTAINERS update for HiSilicon PCI Trace & Tune drivers
- Minor fixes to hisi_ptt driver
- Various fixes to the coresight etm4x dirvers
Signed-off-by: Suzuki K Poulose <suzuki.poulose(a)arm.com>
----------------------------------------------------------------
Jonathan Cameron (1):
MAINTAINERS: Update HiSilicon PCI Trace and Tune maintainer
Kuan-Wei Chiu (1):
coresight: etm3x: Fix cntr_val_show() to match cntr_val_store() behavior
Sanman Pradhan (2):
hwtracing: hisi_ptt: Propagate DMA reset timeout in trace_start()
hwtracing: hisi_ptt: Remove unnecessary trace buffer zeroing in trace_start()
Yeoreum Yun (5):
coresight: etm4x: fix wrong check of etm4x_sspcicrn_present()
coresight: etm4x: fix underflow for usage of (nrseqstate - 1)
coresight: etm4x: fix leaked trace id
coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable
coresight: etm4x: remove redundant fields in etmv4_save_state
MAINTAINERS | 3 +-
.../hwtracing/coresight/coresight-etm3x-sysfs.c | 15 ++----
drivers/hwtracing/coresight/coresight-etm4x-cfg.c | 2 +-
drivers/hwtracing/coresight/coresight-etm4x-core.c | 59 +++++++++++++---------
.../hwtracing/coresight/coresight-etm4x-sysfs.c | 6 ++-
drivers/hwtracing/coresight/coresight-etm4x.h | 12 ++---
drivers/hwtracing/ptt/hisi_ptt.c | 25 ++++-----
7 files changed, 63 insertions(+), 59 deletions(-)
On 03/08/26 4:55 AM, Yuho Choi wrote:
> coresight_get_ref() ignores the return value of pm_runtime_get_sync()
> and reports success even when runtime resume fails. A path is then built
> and the CoreSight device may be accessed while it remains powered off.
>
> Use pm_runtime_resume_and_get() so a failed resume is reported and its
> runtime PM usage reference is rolled back. Drop the module and device
> references acquired before the resume attempt when it fails.
>
> Fixes: 5da5325fa856 ("coresight: moving PM runtime operations to core framework")
> Signed-off-by: Yuho Choi <dbgh9129(a)gmail.com>
> ---
Should 'Fixes:' be tagging the following commit - which had introduced
coresight_get_ref() unconditionally calling pm_runtime_get_sync() ?
32b0707a4182 ("coresight: Add try_get_module() in coresight_grab_device()")
> drivers/hwtracing/coresight/coresight-core.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
> index 6d65c43d574f..77d05b360484 100644
> --- a/drivers/hwtracing/coresight/coresight-core.c
> +++ b/drivers/hwtracing/coresight/coresight-core.c
> @@ -843,7 +843,11 @@ static bool coresight_get_ref(struct coresight_device *csdev)
> goto err_module;
>
> /* Make sure the device is powered on */
> - pm_runtime_get_sync(parent);
> + if (pm_runtime_resume_and_get(parent) < 0) {
> + module_put(drv->owner);
> + goto err_module;
> + }
> +
> return true;
>
> err_module:
