From: Thomas Weißschuh <linux@weissschuh.net>
Date: Tue, 3 Dec 2024 17:09:55 +0000 (+0100)
Subject: ptp: kvm: x86: Return EOPNOTSUPP instead of ENODEV from kvm_arch_ptp_init()
X-Git-Tag: v6.13-rc3~36^2~36
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5e7aa97c7acf171275ac02a8bb018c31b8918d13;p=thirdparty%2Flinux.git

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 617c8d6706d3d..6cea4fe39bcfe 100644
--- 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;
 	}