coresight: tmc-etr: Decouple buffer sync and barrier packet insertion

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If less space is available in the perf ring buffer than the ETR buffer,
barrier packets inserted in the trace stream by tmc_sync_etr_buf() are
skipped over when the head of the buffer is moved forward, resulting in
traces that can't be decoded.

This patch decouples the process of syncing ETR buffers and the addition
of barrier packets in order to perform the latter once the offset in the
trace buffer has been properly computed.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Link: https://lore.kernel.org/r/20190829202842.580-17-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Mathieu Poirier 2019-08-29 14:28:41 -06:00 • committed by Greg Kroah-Hartman

parent 00bb485ce7

commit 3507d231a4

1 changed files with 12 additions and 6 deletions

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drivers/hwtracing/coresight/coresight-tmc-etr.c

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