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[0/4] small fix for configuaring etm csdev via sysfs

Message ID 20241221165934.1161856-1-yeoreum.yun@arm.com (mailing list archive)
Headers show
Series small fix for configuaring etm csdev via sysfs | expand

Message

Yeoreum Yun Dec. 21, 2024, 4:59 p.m. UTC 
when etm csdev's configuration is modified via sysfs while etm is being
enabled via perf, enabled etm could run with different configuration
from perf_event.

Also, there are some redeundant usage of drvdata->spinlock in
etm_starting/dying_cpu() with enable/disable etm device.

This patchset fixes above small problems.

NOTE:
   This patchset based on:
     - https://lore.kernel.org/linux-arm-kernel/20241220104521.809071-1-yeoreum.yun@arm.com/

Yeoreum Yun (4):
  coresight/etm4x: disallow altering config via sysfs while enabled
  coresight/etm4x: remove redundant usage of drvdata->spinlock
  coresight/etm3x: disallow altering config via sysfs while enabled
  coresight/etm3x: remove redundant usage of drvdata->spinlock

 .../coresight/coresight-etm3x-core.c          |  33 ++---
 .../coresight/coresight-etm3x-sysfs.c         | 120 ++++++++++++++++
 .../coresight/coresight-etm4x-core.c          |  20 +--
 .../coresight/coresight-etm4x-sysfs.c         | 132 +++++++++++++++++-
 4 files changed, 272 insertions(+), 33 deletions(-)

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