linux-kernel - [PATCH v5 6/6] mips/kvm: Use ENOIOCTLCMD to indicate unimplemented ioctls.

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Date:	Wed, 22 May 2013 11:43:56 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	linux-mips@...ux-mips.org, ralf@...ux-mips.org,
	kvm@...r.kernel.org, Sanjay Lal <sanjayl@...asys.com>,
	Gleb Natapov <gleb@...hat.com>
Cc:	linux-kernel@...r.kernel.org, David Daney <david.daney@...ium.com>
Subject: [PATCH v5 6/6] mips/kvm: Use ENOIOCTLCMD to indicate unimplemented ioctls.

From: David Daney <david.daney@...ium.com>

The Linux Way is to return -ENOIOCTLCMD to the vfs when an
unimplemented ioctl is requested.  Do this in kvm_mips instead of a
random mixture of -ENOTSUPP and -EINVAL.

Signed-off-by: David Daney <david.daney@...ium.com>
---
 arch/mips/kvm/kvm_mips.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c
index 5aec4f4..13e9438 100644
--- a/arch/mips/kvm/kvm_mips.c
+++ b/arch/mips/kvm/kvm_mips.c
@@ -195,7 +195,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
 long
 kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
 {
-	return -EINVAL;
+	return -ENOIOCTLCMD;
 }
 
 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
@@ -401,7 +401,7 @@ int
 kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 				    struct kvm_guest_debug *dbg)
 {
-	return -EINVAL;
+	return -ENOIOCTLCMD;
 }
 
 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
@@ -475,14 +475,14 @@ int
 kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
 				struct kvm_mp_state *mp_state)
 {
-	return -EINVAL;
+	return -ENOIOCTLCMD;
 }
 
 int
 kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
 				struct kvm_mp_state *mp_state)
 {
-	return -EINVAL;
+	return -ENOIOCTLCMD;
 }
 
 #define KVM_REG_MIPS_CP0_INDEX (0x10000 + 8 * 0 + 0)
@@ -799,7 +799,7 @@ long kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
 
 	switch (ioctl) {
 	default:
-		r = -EINVAL;
+		r = -ENOIOCTLCMD;
 	}
 
 	return r;
@@ -827,13 +827,13 @@ void kvm_arch_exit(void)
 int
 kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 {
-	return -ENOTSUPP;
+	return -ENOIOCTLCMD;
 }
 
 int
 kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
 {
-	return -ENOTSUPP;
+	return -ENOIOCTLCMD;
 }
 
 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
@@ -843,12 +843,12 @@ int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 
 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 {
-	return -ENOTSUPP;
+	return -ENOIOCTLCMD;
 }
 
 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 {
-	return -ENOTSUPP;
+	return -ENOIOCTLCMD;
 }
 
 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
-- 
1.7.11.7

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