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path: root/drivers/s390/block/dasd_proc.c
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Diffstat (limited to 'drivers/s390/block/dasd_proc.c')
-rw-r--r--drivers/s390/block/dasd_proc.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index 78ac905a5b7f..aa7bb2d1da81 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -212,14 +212,15 @@ static int dasd_stats_proc_show(struct seq_file *m, void *v)
struct dasd_profile_info *prof;
int factor;
- /* check for active profiling */
- if (!dasd_global_profile_level) {
+ spin_lock_bh(&dasd_global_profile.lock);
+ prof = dasd_global_profile.data;
+ if (!prof) {
+ spin_unlock_bh(&dasd_global_profile.lock);
seq_printf(m, "Statistics are off - they might be "
"switched on using 'echo set on > "
"/proc/dasd/statistics'\n");
return 0;
}
- prof = &dasd_global_profile_data;
/* prevent counter 'overflow' on output */
for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
@@ -255,6 +256,7 @@ static int dasd_stats_proc_show(struct seq_file *m, void *v)
dasd_statistics_array(m, prof->dasd_io_time3, factor);
seq_printf(m, "# of req in chanq at enqueuing (1..32) \n");
dasd_statistics_array(m, prof->dasd_io_nr_req, factor);
+ spin_unlock_bh(&dasd_global_profile.lock);
#else
seq_printf(m, "Statistics are not activated in this kernel\n");
#endif
@@ -291,14 +293,19 @@ static ssize_t dasd_stats_proc_write(struct file *file,
dasd_stats_all_block_off();
goto out_error;
}
- dasd_global_profile_reset();
+ rc = dasd_profile_on(&dasd_global_profile);
+ if (rc) {
+ dasd_stats_all_block_off();
+ goto out_error;
+ }
+ dasd_profile_reset(&dasd_global_profile);
dasd_global_profile_level = DASD_PROFILE_ON;
pr_info("The statistics feature has been switched "
"on\n");
} else if (strcmp(str, "off") == 0) {
- /* switch off and reset statistics profiling */
+ /* switch off statistics profiling */
dasd_global_profile_level = DASD_PROFILE_OFF;
- dasd_global_profile_reset();
+ dasd_profile_off(&dasd_global_profile);
dasd_stats_all_block_off();
pr_info("The statistics feature has been switched "
"off\n");
@@ -306,7 +313,7 @@ static ssize_t dasd_stats_proc_write(struct file *file,
goto out_parse_error;
} else if (strncmp(str, "reset", 5) == 0) {
/* reset the statistics */
- dasd_global_profile_reset();
+ dasd_profile_reset(&dasd_global_profile);
dasd_stats_all_block_reset();
pr_info("The statistics have been reset\n");
} else