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path: root/drivers/hwtracing/intel_th/sth.c
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2016-02-20intel_th: sth: Sanitize packet callback's return valuesAlexander Shishkin1-3/+8
According to the stm class interface, the packet callback should return an error if it is asked to generate packets that it doesn't support. When it succeeds, it should return number of bytes consumed from its payload. Currently, for FLAG packet it mistakenly returns 1. This patch addresses these issues. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-16intel_th: Check for NULL instead of ERR_PTRDan Carpenter1-4/+4
devm_ioremap() returns NULL on error, it doesn't return an ERR_PTR, which is what the current code does. This patch corrects these checks. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-04intel_th: Add Software Trace Hub driverAlexander Shishkin1-0/+259
Software Trace Hub (STH) is a trace source device in the Intel TH architecture, it generates data that then goes through the switch into one or several output ports. STH collects data from software sources using the stm device class abstraction. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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