s390/cpum_cf: Corrected return code for unauthorized counter sets

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Previously, the cpum_cf PMU returned -EPERM if a counter is requested and
the counter set to which the counter belongs is not authorized.  According
to the perf_event_open() system call manual, an error code of EPERM indicates
an unsupported exclude setting or CAP_SYS_ADMIN is missing.

Use ENOENT to indicate that particular counters are not available when the
counter set which contains the counter is not authorized.  For generic events,
this might trigger a fall back, for example, to a software event.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Hendrik Brueckner 2015-09-07 10:52:42 +02:00 • committed by Martin Schwidefsky

parent 8d4bd0ed04

commit 58f8e9da33

1 changed files with 8 additions and 4 deletions

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arch/s390/kernel/perf_cpum_cf.c

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