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powerpc/secvar: Fix incorrect return in secvar_sysfs_load()

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secvar_ops->get_next() returns -ENOENT when there are no more variables
to return, which is expected behaviour.

Fix this by returning 0 if get_next() returns -ENOENT.

This fixes an issue introduced in commit bd5d9c743d ("powerpc: expose
secure variables to userspace via sysfs"), but the return code of
secvar_sysfs_load() was never checked so this issue never mattered.

Signed-off-by: Russell Currey <ruscur@russell.cc>
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/20230210080401.345462-4-ajd@linux.ibm.com
This commit is contained in:
Russell Currey 2023-02-10 19:03:38 +11:00 committed by Michael Ellerman
parent fcf63d6b8a
commit c9fd295275
1 changed files with 4 additions and 2 deletions
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6
arch/powerpc/kernel/secvar-sysfs.c
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@ -179,8 +179,10 @@ static int secvar_sysfs_load(void)
rc = secvar_ops->get_next(name, &namesize, NAME_MAX_SIZE);
if (rc) {
if (rc != -ENOENT)
pr_err("error getting secvar from firmware %d\n",
rc);
pr_err("error getting secvar from firmware %d\n", rc);
else
rc = 0;
break;
}