s390/perf: Change CPUM_CF return code in event init function

[ Upstream commit 0bb2ae1b26e1fb7543ec7474cdd374ac4b88c4da ]

The function perf_init_event() creates a new event and
assignes it to a PMU. This a done in a loop over all existing
PMUs. For each listed PMU the event init function is called
and if this function does return any other error than -ENOENT,
the loop is terminated the creation of the event fails.

If the event is invalid, return -ENOENT to try other PMUs.

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index 746d034..61e91fe 100644 (file)
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/arch/s390/kernel/perf_cpum_cf.c
@@ -376,7 +376,7 @@ static int __hw_perf_event_init(struct perf_event *event)
                return -ENOENT;
 
        if (ev > PERF_CPUM_CF_MAX_CTR)
-               return -EINVAL;
+               return -ENOENT;
 
        /* Obtain the counter set to which the specified counter belongs */
        set = get_counter_set(ev);