powerpc/secvar: Fix incorrect return in secvar_sysfs_load()

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 bd5d9c743d38 ("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

diff --git a/arch/powerpc/kernel/secvar-sysfs.c b/arch/powerpc/kernel/secvar-sysfs.c
index 1ee4640..7fa5f8e 100644 (file)
--- a/arch/powerpc/kernel/secvar-sysfs.c
+++ b/arch/powerpc/kernel/secvar-sysfs.c
@@ -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;
                }