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It appears that the STM code didn't manage to accurately decypher the
delicate inner workings of an alternative thought process behind the
UUID API and directly called generate_random_uuid() that clearly needs
to be a static function in lib/uuid.c.
At the same time, said STM code is poking directly at the byte array
inside the uuid_t when it uses the UUID for its internal purposes.
Fix these two transgressions by using intended APIs instead.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[ash: changed back to uuid_t and updated the commit message]
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Link: https://lore.kernel.org/r/20210415091555.88085-1-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The operands of time_after() are in a wrong order in both instances in
the sys-t driver. Fix that.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Fixes: 39f10239df75 ("stm class: p_sys-t: Add support for CLOCKSYNC packets")
Fixes: d69d5e83110f ("stm class: Add MIPI SyS-T protocol support")
Cc: stable@vger.kernel.org # v4.20+
Link: https://lore.kernel.org/r/20200317062215.15598-3-alexander.shishkin@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This adds support for CLOCKSYNC SyS-T packets, that establish correlation
between the transport clock (STP timestamps) and SyS-T timestamps. These
packets are sent periodically to allow the decoder to keep both time
sources in sync.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This adds support for MIPI SyS-T protocol as specified in an open
standard [1]. In addition to marking message boundaries, it also
supports tagging messages with the source UUID, to provide better
distinction between trace sources, including payload length and
timestamp in the message's metadata.
This driver adds attributes to STP policy nodes to control/configure
these metadata features.
[1] https://www.mipi.org/specifications/sys-t
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Tested-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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