[S390] oprofile: fix min/max interval query checks
oprofile_min_interval and oprofile_max_interval are unsigned, checking
for negative values doesn't work. Change hwsampler_query_min_interval
and hwsampler_query_max_interval to return an unsigned long and
check for a zero value instead.
Reported-by: Nicolas Kaiser <nikai@nikai.net>
Acked-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/oprofile/init.c b/arch/s390/oprofile/init.c
index c63d7e5..5995e9b 100644
--- a/arch/s390/oprofile/init.c
+++ b/arch/s390/oprofile/init.c
@@ -145,15 +145,11 @@
* create hwsampler files only if hwsampler_setup() succeeds.
*/
oprofile_min_interval = hwsampler_query_min_interval();
- if (oprofile_min_interval < 0) {
- oprofile_min_interval = 0;
+ if (oprofile_min_interval == 0)
return -ENODEV;
- }
oprofile_max_interval = hwsampler_query_max_interval();
- if (oprofile_max_interval < 0) {
- oprofile_max_interval = 0;
+ if (oprofile_max_interval == 0)
return -ENODEV;
- }
if (oprofile_timer_init(ops))
return -ENODEV;