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powerpc/secvar: Don't print error on ENOENT when reading variables 

If attempting to read the size or data attributes of a  non-existent
variable (which will be possible after a later patch to expose the PLPKS
via the secvar interface), don't spam the kernel log with error messages.
Only print errors for return codes that aren't ENOENT.

Reported-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com>
Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com>
Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230210080401.345462-14-ajd@linux.ibm.com
This commit is contained in:
Andrew Donnellan 2023-02-10 19:03:48 +11:00 committed by Michael Ellerman
parent 6d64c497a3
commit c96db155eb
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
arch/powerpc/kernel/secvar-sysfs.c
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@ -43,8 +43,8 @@ static ssize_t size_show(struct kobject *kobj, struct kobj_attribute *attr,
rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize);
if (rc) {
pr_err("Error retrieving %s variable size %d\n", kobj->name,
rc);
if (rc != -ENOENT)
pr_err("Error retrieving %s variable size %d\n", kobj->name, rc);
return rc;
}
@ -61,7 +61,8 @@ static ssize_t data_read(struct file *filep, struct kobject *kobj,
rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize);
if (rc) {
pr_err("Error getting %s variable size %d\n", kobj->name, rc);
if (rc != -ENOENT)
pr_err("Error getting %s variable size %d\n", kobj->name, rc);
return rc;
}
pr_debug("dsize is %llu\n", dsize);