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path: root/drivers/hwtracing/stm/heartbeat.c
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2024-05-04stm class: Add source typeMikhail Lappo1-0/+1
Currently kernel HW tracing infrastrtucture and specifically its SyS-T part treats all source data in the same way. Treating and encoding different trace data sources differently might allow decoding software to make use of e.g. ftrace event ids by converting them to a SyS-T message catalog. The solution is to keep source type stored within stm_source_data structure to allow different handling by stm output/protocol. Currently we only differentiate between STM_USER and STM_FTRACE sources. Signed-off-by: Mikhail Lappo <[email protected]> Signed-off-by: Alexander Shishkin <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2021-01-21stm class: Fix module init return on allocation failureWang Hui1-2/+4
In stm_heartbeat_init(): return value gets reset after the first iteration by stm_source_register_device(), so allocation failures after that will, after a clean up, return success. Fix that. Fixes: 119291853038 ("stm class: Add heartbeat stm source device") Reported-by: Hulk Robot <[email protected]> Signed-off-by: Wang Hui <[email protected]> Signed-off-by: Alexander Shishkin <[email protected]> Link: https://lore.kernel.org/r/[email protected] Cc: stable <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2018-10-11stm class: heartbeat: Fix whitespaceAlexander Shishkin1-1/+1
Fix whitespace in the code for better readability, no functional changes. Signed-off-by: Alexander Shishkin <[email protected]> Tested-by: Mathieu Poirier <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2018-03-28stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplateAlexander Shishkin1-9/+1
This adds SPDX GPL-2.0 header to to stm core files and removes the GPLv2 boilerplate text. Signed-off-by: Alexander Shishkin <[email protected]>
2016-04-08stm class: stm_heartbeat: Make nr_devs parameter read-onlyAlexander Shishkin1-9/+5
Changing nr_devs after the module has been loaded doesn't actually change anything, so just make it read-only. Reported-by: Alan Cox <[email protected]> Signed-off-by: Alexander Shishkin <[email protected]> Reviewed-by: Laurent Fert <[email protected]>
2016-02-20stm class: Add heartbeat stm source deviceAlexander Shishkin1-0/+130
Heartbeat stm source may have multiple instances (for connecting to different stm devices). Each instance will send a periodic test message over its stm device when it is linked. This can be used for testing stm class framework, stm device drivers or as a heartbeat over the stm link. Signed-off-by: Alexander Shishkin <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
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