[PATCH 02/12] pseries/plpks: fix error code for wrapping key reads

[Srish Srinivasan]

PLPKS variables with the PLPKS_WRAPPINGKEY policy bit set are not
readable. Return -EPERM instead of -EINVAL in this case to better
reflect the access restriction being enforced.

Fixes: 133aa79e211d ("pseries/plpks: add HCALLs for PowerVM Key Wrapping Module")
Cc: stable@xxxxxxxxxxxxxxx # 7.0
Signed-off-by: Srish Srinivasan <ssrish@xxxxxxxxxxxxx>
Tested-by: R Nageswara Sastry <rnsastry@xxxxxxxxxxxxx>
---
 arch/powerpc/platforms/pseries/plpks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/plpks.c b/arch/powerpc/platforms/pseries/plpks.c
index 7e56b3dcacbc..ccf5765a907b 100644
--- a/arch/powerpc/platforms/pseries/plpks.c
+++ b/arch/powerpc/platforms/pseries/plpks.c
@@ -829,7 +829,7 @@ static int plpks_read_var(u8 consumer, struct plpks_var *var)
 		return -EINVAL;
 
 	if (var->policy & PLPKS_WRAPPINGKEY)
-		return -EINVAL;
+		return -EPERM;
 
 	auth = construct_auth(consumer);
 	if (IS_ERR(auth))
-- 
2.52.0