mac80211: bracket driver tracing

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Currently, driver tracing is sometimes invoked
after and sometimes before the actual driver
callback. This is fine as long as the driver
has no tracing itself, but as soon as it does
it gets confusing.

To make traces containing such information
easier to read, introduce a return tracer in
mac80211 that essentially brackets any driver
tracing, and invoke the real trace before the
driver's callback, only showing the return
value, if any, afterwards.

Since tracing records the process, there's no
problem with overlapping calls if that should
happen.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

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This commit is contained in:

Johannes Berg 2010-06-10 10:56:20 +02:00 • committed by John W. Linville

parent 8b58ff832d

commit 4efc76bdbf

2 changed files with 156 additions and 122 deletions

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89

net/mac80211/driver-ops.h

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191

net/mac80211/driver-trace.h

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