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s390/sclp_async: replace callhome proc handler with generic one

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Reuse generic proc_dointvec_minmax proc handler instead of
proc_handler_callhome.

Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik 2018-06-24 23:28:12 +02:00 committed by Martin Schwidefsky
parent 5bedf8aa03
commit f149371e9e
1 changed files with 7 additions and 31 deletions
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38
drivers/s390/char/sclp_async.c
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@ -64,42 +64,18 @@ static struct notifier_block call_home_panic_nb = {
.priority = INT_MAX,
};
static int proc_handler_callhome(struct ctl_table *ctl, int write,
void __user *buffer, size_t *count,
loff_t *ppos)
{
unsigned long val;
int len, rc;
char buf[3];
if (!*count || (*ppos && !write)) {
*count = 0;
return 0;
}
if (!write) {
len = snprintf(buf, sizeof(buf), "%d\n", callhome_enabled);
rc = copy_to_user(buffer, buf, sizeof(buf));
if (rc != 0)
return -EFAULT;
} else {
len = *count;
rc = kstrtoul_from_user(buffer, len, 0, &val);
if (rc)
return rc;
if (val != 0 && val != 1)
return -EINVAL;
callhome_enabled = val;
}
*count = len;
*ppos += len;
return 0;
}
static int zero;
static int one = 1;
static struct ctl_table callhome_table[] = {
{
.procname = "callhome",
.data = &callhome_enabled,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_handler_callhome,
.proc_handler = proc_dointvec_minmax,
.extra1 = &zero,
.extra2 = &one,
},
{}
};