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We attempt to sanity check the buffer depth reported by the hardware by
making sure it is not less than zero however this check will never be true
since the buffer depth is stored in an unsigned integer. Instead change
the check to look for the top bit being set which was the intention.
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
When we initialise the ETB driver we attempt to allocate a buffer suitable
for storing the data buffered in the hardware based on sizing information
reported by the hardware. Unfortunately if the hardware is not properly
configured (for example if power domains are not set up correctly) then we
may read back a nonsensically large value and therefore the allocation will
be too big to succeed. Print an error message showing the amount of memory
we tried to allocate if the buffer allocation fails to help users diagnose
such problems.
Normally it is bad practice to print an error message on memory allocation
failures since there are verbose core messages reported for this but in
this case where the allocation size might be incorrect it is a useful hint.
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Keeping drivers related to HW tracing on ARM, i.e coresight,
under "drivers/coresight" doesn't make sense when other
architectures start rolling out technologies of the same
nature.
As such creating a new "drivers/hwtracing" directory where all
drivers of the same kind can reside, reducing namespace
pollution under "drivers/".
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
