From fb82d4dbee95f0605fa34d0903c1f9f7ca650afb Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Tue, 12 Oct 2021 12:35:20 -0400
Subject: [PATCH] KVM: x86: remove unnecessary arguments from complete_emulator_pio_in
Git-commit: 6b5efc930bbc8c97e4a1fe2ccb9a6f286365a56d
Patch-mainline: v5.15-rc7
References: stable-5.14.15

commit 6b5efc930bbc8c97e4a1fe2ccb9a6f286365a56d upstream.

complete_emulator_pio_in can expect that vcpu->arch.pio has been filled in,
and therefore does not need the size and count arguments.  This makes things
nicer when the function is called directly from a complete_userspace_io
callback.

No functional change intended.

Cc: stable@vger.kernel.org
Fixes: 7ed9abfe8e9f ("KVM: SVM: Support string IO operations for an SEV-ES guest")
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 arch/x86/kvm/x86.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f7f58c502925..8e9df0e00f3d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6936,11 +6936,12 @@ static int __emulator_pio_in(struct kvm_vcpu *vcpu, int size,
 	return emulator_pio_in_out(vcpu, size, port, count, true);
 }
 
-static void complete_emulator_pio_in(struct kvm_vcpu *vcpu, int size,
-				    unsigned short port, void *val)
+static void complete_emulator_pio_in(struct kvm_vcpu *vcpu, void *val)
 {
-	memcpy(val, vcpu->arch.pio_data, size * vcpu->arch.pio.count);
-	trace_kvm_pio(KVM_PIO_IN, port, size, vcpu->arch.pio.count, vcpu->arch.pio_data);
+	int size = vcpu->arch.pio.size;
+	unsigned count = vcpu->arch.pio.count;
+	memcpy(val, vcpu->arch.pio_data, size * count);
+	trace_kvm_pio(KVM_PIO_IN, vcpu->arch.pio.port, size, count, vcpu->arch.pio_data);
 	vcpu->arch.pio.count = 0;
 }
 
@@ -6958,7 +6959,7 @@ static int emulator_pio_in(struct kvm_vcpu *vcpu, int size,
 	}
 
 	WARN_ON(count != vcpu->arch.pio.count);
-	complete_emulator_pio_in(vcpu, size, port, val);
+	complete_emulator_pio_in(vcpu, val);
 	return 1;
 }
 
-- 
2.26.2