ptp: kvm: x86: Return EOPNOTSUPP instead of ENODEV from kvm_arch_ptp_init()

The caller, ptp_kvm_init(), emits a warning if kvm_arch_ptp_init() exits
with any error which is not EOPNOTSUPP:

	"fail to initialize ptp_kvm"

Replace ENODEV with EOPNOTSUPP to avoid this spurious warning,
aligning with the ARM implementation.

Fixes: a86ed2cfa13c ("ptp: Don't print an error if ptp_kvm is not supported")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20241203-kvm_ptp-eopnotsuppp-v2-1-d1d060f27aa6@weissschuh.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/ptp/ptp_kvm_x86.c b/drivers/ptp/ptp_kvm_x86.c
index 617c8d6706d3d00f7167fbf7e5b624ced29a206d..6cea4fe39bcfe46ba3b54b0815d3a3d034d415ea 100644 (file)
--- a/drivers/ptp/ptp_kvm_x86.c
+++ b/drivers/ptp/ptp_kvm_x86.c
@@ -26,7 +26,7 @@ int kvm_arch_ptp_init(void)
        long ret;
 
        if (!kvm_para_available())
-               return -ENODEV;
+               return -EOPNOTSUPP;
 
        if (cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT)) {
                p = alloc_page(GFP_KERNEL | __GFP_ZERO);
@@ -46,14 +46,14 @@ int kvm_arch_ptp_init(void)
 
        clock_pair_gpa = slow_virt_to_phys(clock_pair);
        if (!pvclock_get_pvti_cpu0_va()) {
-               ret = -ENODEV;
+               ret = -EOPNOTSUPP;
                goto err;
        }
 
        ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, clock_pair_gpa,
                             KVM_CLOCK_PAIRING_WALLCLOCK);
        if (ret == -KVM_ENOSYS) {
-               ret = -ENODEV;
+               ret = -EOPNOTSUPP;
                goto err;
        }