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s390/cpum_cf: log bad return code of function cfset_all_copy

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When function cfset_all_copy() fails, also log the bad return code
in the debug statement (when turned on).
No functional change

Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Thomas Richter 2023-02-24 08:55:21 +01:00 committed by Vasily Gorbik
parent 1707c11652
commit 3cdf0269cd
1 changed files with 9 additions and 6 deletions
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15
arch/s390/kernel/perf_cpum_cf.c
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@ -1290,7 +1290,7 @@ static size_t cfset_needspace(unsigned int sets)
static int cfset_all_copy(unsigned long arg, cpumask_t *mask)
{
struct s390_ctrset_read __user *ctrset_read;
unsigned int cpu, cpus, rc;
unsigned int cpu, cpus, rc = 0;
void __user *uptr;
ctrset_read = (struct s390_ctrset_read __user *)arg;
@ -1304,17 +1304,20 @@ static int cfset_all_copy(unsigned long arg, cpumask_t *mask)
rc |= put_user(cpuhw->sets, &ctrset_cpudata->no_sets);
rc |= copy_to_user(ctrset_cpudata->data, cpuhw->data,
cpuhw->used);
if (rc)
return -EFAULT;
if (rc) {
rc = -EFAULT;
goto out;
}
uptr += sizeof(struct s390_ctrset_cpudata) + cpuhw->used;
cond_resched();
}
cpus = cpumask_weight(mask);
if (put_user(cpus, &ctrset_read->no_cpus))
return -EFAULT;
debug_sprintf_event(cf_dbg, 4, "%s copied %ld\n", __func__,
rc = -EFAULT;
out:
debug_sprintf_event(cf_dbg, 4, "%s rc %d copied %ld\n", __func__, rc,
uptr - (void __user *)ctrset_read->data);
return 0;
return rc;
}
static size_t cfset_cpuset_read(struct s390_ctrset_setdata *p, int ctrset,