Subject: [PATCH v6 03/26] powerpc/secvar: Fix incorrect return in secvar_sysfs_load()

From: Andrew Donnellan <[email-masked]>
Date: Fri, 10 Feb 2023 19:03:38 +1100

From: Russell Currey <[email-masked]>

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 <[email-masked]>
Signed-off-by: Andrew Donnellan <[email-masked]>
Reviewed-by: Stefan Berger <[email-masked]>

---

v5: New patch
---
 arch/powerpc/kernel/secvar-sysfs.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/secvar-sysfs.c b/arch/powerpc/kernel/secvar-sysfs.c
index 1ee4640a2641..7fa5f8ed9542 100644
--- 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;
 		}
 
-- 
2.39.1