Guilherme G. Piccoli 1adff542d6 coresight: cpu-debug: Replace mutex with mutex_trylock on panic notifier ... The panic notifier infrastructure executes registered callbacks when a panic event happens - such callbacks are executed in atomic context, with interrupts and preemption disabled in the running CPU and all other CPUs disabled. That said, mutexes in such context are not a good idea. This patch replaces a regular mutex with a mutex_trylock safer approach; given the nature of the mutex used in the driver, it should be pretty uncommon being unable to acquire such mutex in the panic path, hence no functional change should be observed (and if it is, that would be likely a deadlock with the regular mutex). Fixes: 2227b7c746 ("coresight: add support for CPU debug module") Cc: Leo Yan <leo.yan@linaro.org> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Mike Leach <mike.leach@linaro.org> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com> Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Link: https://lore.kernel.org/r/20220427224924.592546-10-gpiccoli@igalia.com		2022-05-09 16:03:24 +01:00
..
coresight-catu.c	Merge branch 'devel-stable' of git://git.armlinux.org.uk/~rmk/linux-arm into char-misc-next	2021-02-05 11:15:43 +01:00
coresight-catu.h	coresight: tmc-etr: Add function to register catu ops	2020-09-28 19:47:42 +02:00
coresight-cfg-afdo.c	coresight: config: Add preloaded configurations	2021-08-18 22:33:28 +02:00
coresight-cfg-preload.c	coresight: configuration: Update API to introduce load owner concept	2021-11-26 11:27:21 -07:00
coresight-cfg-preload.h	coresight: config: Add preloaded configurations	2021-08-18 22:33:28 +02:00
coresight-config.c	coresight: config: Add configuration and feature generic functions	2021-08-18 22:33:27 +02:00
coresight-config.h	treewide: Replace zero-length arrays with flexible-array members	2022-02-17 07:00:39 -06:00
coresight-core.c	coresight: core: Fix coresight device probe failure issue	2022-05-04 11:43:59 +01:00
coresight-cpu-debug.c	coresight: cpu-debug: Replace mutex with mutex_trylock on panic notifier	2022-05-09 16:03:24 +01:00
coresight-cti-core.c	coresight: cti: Correct the parameter for pm_runtime_put	2021-10-27 11:44:26 -06:00
coresight-cti-platform.c	coresight: cti: Reduce scope for the variable 'cs_fwnode' in cti_plat_create_connection()	2021-02-04 17:00:32 +01:00
coresight-cti-sysfs.c	coresight: cti: Initialize dynamic sysfs attributes	2020-10-29 20:10:25 +01:00
coresight-cti.h	coresight: Include required headers in C files	2020-05-19 16:31:18 +02:00
coresight-etb10.c	coresight: Update comments for removing cs_etm_find_snapshot()	2021-10-27 11:44:50 -06:00
coresight-etm3x-core.c	coresight: etm3x: Cleanup ETMTECR1 register accesses	2022-04-13 11:05:17 -06:00
coresight-etm3x-sysfs.c	coresight: etm3x: Cleanup ETMTECR1 register accesses	2022-04-13 11:05:17 -06:00
coresight-etm4x-cfg.c	coresight: etm4x: Add complex configuration handlers to etmv4	2021-08-18 22:33:28 +02:00
coresight-etm4x-cfg.h	coresight: config: Add preloaded configurations	2021-08-18 22:33:28 +02:00
coresight-etm4x-core.c	coresight: etm4x: Cleanup TRCSSCCRn and TRCSSCSRn register accesses	2022-04-13 11:05:31 -06:00
coresight-etm4x-sysfs.c	coresight: etm4x: Cleanup TRCRSCTLRn register accesses	2022-04-13 11:05:56 -06:00
coresight-etm4x.h	coresight: etm4x: Cleanup TRCRSCTLRn register accesses	2022-04-13 11:05:56 -06:00
coresight-etm-cp14.c	coresight: Moving framework and drivers to SPDX identifier	2018-05-14 16:19:59 +02:00
coresight-etm-perf.c	coresight: etm-pmu: Ensure the AUX handle is valid	2021-10-27 11:45:20 -06:00
coresight-etm-perf.h	coresight: etm-perf: Update to activate selected configuration	2021-08-18 22:33:28 +02:00
coresight-etm.h	coresight: etm: Clean up device specific data	2019-06-19 20:29:14 +02:00
coresight-funnel.c	Merge branch 'devel-stable' of git://git.armlinux.org.uk/~rmk/linux-arm into char-misc-next	2021-02-05 11:15:43 +01:00
coresight-platform.c	hwtracing: coresight: Replace acpi_bus_get_device()	2022-03-11 10:07:34 +00:00
coresight-priv.h	coresight: core: Add support for dedicated percpu sinks	2021-04-06 16:05:38 -06:00
coresight-replicator.c	Merge branch 'devel-stable' of git://git.armlinux.org.uk/~rmk/linux-arm into char-misc-next	2021-02-05 11:15:43 +01:00
coresight-self-hosted-trace.h	coresight: trbe: Prohibit trace before disabling TRBE	2021-10-27 11:45:33 -06:00
coresight-stm.c	coresight: Use devm_bitmap_zalloc when applicable	2021-11-16 10:13:21 -07:00
coresight-syscfg-configfs.c	coresight: configfs: Allow configfs to activate configuration	2021-11-26 11:34:27 -07:00
coresight-syscfg-configfs.h	coresight: configfs: Allow configfs to activate configuration	2021-11-26 11:34:27 -07:00
coresight-syscfg.c	coresight: syscfg: Fix memleak on registration failure in cscfg_create_device	2022-03-11 10:07:26 +00:00
coresight-syscfg.h	coresight: configfs: Allow configfs to activate configuration	2021-11-26 11:34:27 -07:00
coresight-sysfs.c	coresight: Export global symbols	2020-09-28 19:47:40 +02:00
coresight-tmc-core.c	coresight: tmc: Configure AXI write burst size	2021-10-27 11:44:34 -06:00
coresight-tmc-etf.c	coresight: Update comments for removing cs_etm_find_snapshot()	2021-10-27 11:44:50 -06:00
coresight-tmc-etr.c	coresight: tmc-etr: Speed up for bounce buffer in flat mode	2021-10-27 11:44:52 -06:00
coresight-tmc.h	coresight: tmc: Configure AXI write burst size	2021-10-27 11:44:34 -06:00
coresight-tpiu.c	Merge branch 'devel-stable' of git://git.armlinux.org.uk/~rmk/linux-arm into char-misc-next	2021-02-05 11:15:43 +01:00
coresight-trbe.c	coresight: trbe: Move check for kernel page table isolation from EL0 to probe	2022-03-11 10:07:43 +00:00
coresight-trbe.h	coresight: trbe: Work around the ignored system register writes	2022-03-11 10:06:35 +00:00
Kconfig	coresight: cpu-debug: Control default behavior via Kconfig	2021-10-27 11:44:30 -06:00
Makefile	coresight: syscfg: Add initial configfs support	2021-08-18 22:33:28 +02:00