coresight: etm4x: Handle accesses to TRCSTALLCTLR

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commit f728960633 upstream.

TRCSTALLCTLR register is only implemented if

   TRCIDR3.STALLCTL == 0b1

Make sure the driver touches the register only it is implemented.

Link: https://lore.kernel.org/r/20210127184617.3684379-1-suzuki.poulose@arm.com
Cc: stable@vger.kernel.org
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20210201181351.1475223-32-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Suzuki K Poulose 2021-02-01 11:13:51 -07:00 • committed by Greg Kroah-Hartman

parent 306b9513d3

commit 1900947215

2 changed files with 7 additions and 4 deletions

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9

drivers/hwtracing/coresight/coresight-etm4x-core.c

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2

drivers/hwtracing/coresight/coresight-etm4x-sysfs.c

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